wiktionary geneticGenetic may refer to Genetics , in biology, the science of genes, heredity, and the variation of organisms Genetic, used as an adjective, refers to heredity of traits Gene , a unit of heredity in the genome of an organism Genetic linguistics , in linguistics, a relationship between two languages with a common ancestor language Genetic algorithm , in computer science, a kind of search technique modeled on evolutionary biology disambiguation simple Genetic ur ... more details
Epistasis the essential role of gene interactions in the structure and evolution of genetic systems ... moth caption2 Black morph in peppered moth evolution Further Genetic diversity Population genetics ... synthesis defines evolution as the change over time in this genetic variation. The frequency of one ... selection will only cause evolution if there is enough genetic variation in a population. Before the discovery ... inheritance, genetic variance would be rapidly lost, making evolution by natural selection implausible ... ref Sex usually increases genetic variation and may increase the rate of evolution. ref cite journal ... Combinatorial geneticevolution of multiresistance journal Curr. Opin. Microbiol. volume 9 issue 5 ...About evolution in biology pp semi protected small yes See introduction Evolutionary biology NOTE Please ... discussed and there is general consensus that this is the best one for now. Thanks. Evolution is any ... organisms and molecular evolution molecules such as DNA and protein s. ref name Hall08 cite ... s Evolution year 2008 edition 4th publisher Jones & Bartlett isbn 0763700665 url http www.jblearning.com ... of evolution by means of natural selection . Evolution by natural selection is a process that is inferred ... known cause of evolution. Other, nonadaptive causes of microevolution evolution include mutation and genetic drift . ref name Kimura M 1991 367 86 cite journal author Kimura M title The neutral theory of molecular evolution a review of recent evidence url http www.jstage.jst.go.jp article ... evolutionary synthesis integrated with Darwin s theory of evolution by natural selection through the discipline of population genetics . The importance of natural selection as a cause of evolution was accepted into other branches of biology . Moreover, previously held notions about evolution, such as orthogenesis and Largest scale trends in evolution progress became Obsolete scientific theory obsolete ... in evolution and meaning in life pages 49 79 publisher University of Chicago Press ref Scientists ... more details
A genetic operator is an Operator programming operator used in genetic algorithms to maintain genetic diversity , known as Mutation genetic algorithm and to combine existing solutions into others, Crossover genetic algorithm . The main difference between them is that the mutation operators operate on one chromosome, that is, they are unary, while the crossover operators are binary operators. Genetic variation is a necessity for the process of evolution . Genetic operators used in genetic algorithms are analogous to those in the natural world survival of the fittest , or selection genetic algorithm selection reproduction crossover genetic algorithm crossover , also called recombination and mutation genetic algorithm mutation . Types of Operators 1. Mutation genetic algorithm 2. Crossover genetic algorithm DEFAULTSORT Genetic Operator Category Genetic algorithms compu AI stub ar ca Operador gen tic algorisme gen tic de Genetischer Operator es Operador gen tico zh ... more details
indels. PNAS 2002 13633 br DEFAULTSORT Genetic Distance Category Phylogenetics evolution stub ...Genetic distance refers to the genetics genetic divergence between species or between populations within a species. It is measured by a variety of parameters. Smaller genetic distances indicate a close genetic relationship whereas large genetic distances indicate a more distant genetic relationship. Genetic distance can be used to compare the genetic similarity between different species, such as humans and chimpanzees. Within a species genetic distance can be used to measure the divergence between different sub species. In its simplest form, the genetic distance between two populations is the difference ... individuals is 50.4 among Basques, 41.2 in France and 41.1 in England. Thus the genetic difference between the Basques and French is 9.2 and the genetic difference between the French and the English is 0.1 for the RH negative trait. The genetic distance of several individual traits can then be averaged to compute an overall genetic distance. ref name CavalliSforza Genes, Peoples, and Languages By L. L. Luigi Luca Cavalli Sforza ISBN 0520228731 ref Measures of genetic distance There are several measures used to indicate genetic distance. ref http www.uwyo.edu dbmcd molmark lect06 lect6.html Population Genetics IV Genetic distances biological vs. geometric approaches. ref These include Fixation index A commonly used measure of genetic distance is the fixation index which varies between 0 and 1 ... that two populations are different species. Nei s standard genetic distance This measure assumes that genetic differences arise due to mutations and genetic drift . ref cite journal last Nei et al. title SAMPLING VARIANCES OF HETEROZYGOSITY AND GENETIC DISTANCE url http www.genetics.org cgi content abstract 76 2 379 year 1973 ref Cavalli Sforza and Edwards 1967 This measure assumes that genetic differences arise due to genetic drift only. Reynolds, Weir, and Cockerham s 1983 This measure assumes ... more details
Unreferenced stub auto yes date December 2009 A genetic equilibrium is at hand for an allele in a gene pool when the gene frequency frequency of that allele is not changing i.e. when it is not evolving . For this to be the case, evolutionary forces acting upon the allele must be equal and opposite. The only basic requirement is that the population be large enough that the effects of genetic drift are minimized. For more see heterozygote advantage , fixation , mutation selection balance , negative frequency dependent selection . There may be inbreeding as this reduces heterozygosity but does not cause evolution. No gene mutations Large population size Limited to no immigration, emigration, or migration genetic flow Gene of interest has no effect on survival reproduction, and there is no natural selection Mating is random panmixis See also Hardy Weinberg equilibrium . DEFAULTSORT Genetic Equilibrium Category Population genetics Genetics stub Evolution stub ... more details
Refimprove date December 2009 Genetic representation is a way of representing solutions individuals in evolutionary computation methods. Genetic representation can encode appearance, behavior, physical qualities of individuals. Designing a good genetic representation that is expressive and evolvable is a hard problem in evolutionary computation. Difference in genetic representations is one of the major criteria drawing a line between known classes of evolutionary computation. Genetic algorithm s use linear binary representations. The most standard one is an array of bit s. Arrays of other types and structures can be used in essentially the same way. The main property that makes these genetic representations convenient is that their parts are easily aligned due to their fixed size. This facilitates simple crossover operation. Variable length representations were also explored in Genetic algorithm s, but crossover implementation is more complex in this case. Evolution strategy uses linear real valued representations, e.g. an array of real values. It uses mostly gaussian mutation and blending averaging crossover. Genetic programming GP pioneered tree like representations and developed genetic operator s suitable for such representations. Tree like representations are used in GP to represent and evolve functional programs with desired properties. ref http www.sover.net nichael nlc publications icga85 index.html Cramer, 1985 ref Human based genetic algorithm HBGA offers a way to avoid solving hard representation problems by outsourcing all genetic operators to outside agents, in this case, humans. The algorithm has no need for knowledge of a particular fixed genetic representation ... for free form and evolving genetic representations. Common genetic representations Genetic algorithm binary array binary tree genetic tree HBGA natural language parse tree References and notes reflist DEFAULTSORT Genetic Representation Category Evolutionary algorithms ... more details
Unreferenced stub auto yes date December 2009 Genetic divergence is the process in which two or more populations of an ancestral species accumulate independent genetic changes mutations through time, often after the populations have become Reproductive isolation reproductively isolated for some period of time. In some cases, subpopulations living in ecology ecologically distinct peripheral environments can exhibit genetic divergence from the remainder of a population, especially where the range of a population is very large see parapatric speciation . The genetic differences among divergent populations can involve silent mutations that have no effect on the phenotype or give rise to significant Morphology biology morphological and or physiology physiological changes. Genetic divergence will always accompany reproductive isolation, either due to novel adaptation s via selection or due to genetic drift , and is the principal mechanism underlying speciation . Evolution DEFAULTSORT Genetic Divergence Category Evolutionary biology Category Genetics Genetics stub bg de Divergenz Biologie et Divergents bioloogia id Divergensi genetis ... more details
Genetic saturation is the reduced appearance, which occurs over time, of Divergence sequence sequence divergence rate that results from reverse mutation s, homoplasies and other multiple changes occurring at single sites along two lineage genetic lineages . Genetic saturation occurs most rapidly on fast evolving sequences, such as the hypervariable region of mitochondrial DNA, or in Short tandem repeat such as on the Y chromosome. See also Molecular clock Human mitochondrial molecular clock Convergent evolution External links cite journal url http mbe.oxfordjournals.org cgi content full 26 3 713 a title Characterizing the Time Dependency of Human Mitochondrial DNA Mutation Rate Estimates year 2009 last Henn et al. doi 10.1093 molbev msn304 first1 B. M. last2 Gignoux first2 C. R. last3 Feldman first3 M. W. last4 Mountain first4 J. L. journal Molecular Biology and Evolution volume 26 issue 3 pages 713 713 cite journal url http mbe.oxfordjournals.org cgi content full 22 7 1561 year 2005 last Ho et al. doi 10.1093 molbev msi145 pmid 15814826 volume 22 issue 7 pages 1561 8 title Time Dependency of Molecular Rate Estimates and Systematic Overestimation of Recent Divergence Times first1 S. Y. W. journal Molecular Biology and Evolution last2 Phillips first2 MJ last3 Cooper first3 A last4 Drummond first4 AJ Category Phylogenetics Category Mitochondrial genetics Category Genetic genealogy ... more details
Expert subject Genetics date June 2009 A genetic predisposition is a genetics genetic affectation which influences the phenotype of an individual organism within a species or population but by definition that phenotype can also be modified by the natural environment environmental conditions. In the rest of the population, conditions cannot have that effect. Genetic test ing is able to identify individuals who are genetically predisposed to certain disease health problems . Behavior Predisposition is the capacity we are born with to learn things such as language and concept of self. Negative environmental influences may block the predisposition ability we have to do some things. Animal behavior Behaviors displayed by animals can be influenced by genetic predispositions. Genetic predisposition towards certain human behaviors is Ethology scientifically investigated by attempts to identify patterns of human behavior that seem to be invariant over long periods of time and in very different cultures ... to have a theory of mind because there has been evolution ary selection for the human ability to adopt ... of others based on personal knowledge of what you would do. It has been proved that there s no genetic predisposition for learning a particular language. Genetic discrimination in health insurance The Genetic Information Nondiscrimination Act , which was http www.genome.gov 24519851 signed ... based on genetic information. See also Human nature Edward Osborne Wilson E. O. Wilson s book on sociobiology and his book Consilience discuss the idea of genetic predisposition to behaviors The field ... the course of evolution. The nature versus nurture debate Behavioral genetics Predispositioning Theory Genetic discrimination Psychiatric genetics Gene environment correlation Medical genetics of Ashkenazi ... Press Reprint edition 1989 ISBN 0 262 54053 3 External links http www.genome.gov 10002328 Genetic discrimination fact sheet from the National Human Genome Research Institute . DEFAULTSORT Genetic Predisposition ... more details
Genetic hitchhiking or genetic draft is the process by which an allele may increase in frequency by virtue of being genetic linkage linked to a gene that is positively selected. ref Cite journal doi 10.1098 rstb.2000.0716 pmid 11127900 volume 355 issue 1403 pages 1553 1562 last Barton first N H title Genetic hitchhiking journal Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences accessdate 2009 09 23 date 2000 11 29 pmc 1692896 ref Proximity on a chromosome may allow genes to be dragged along with a selective sweep experienced by an advantageous gene nearby. More generally, genetic hitchhiking can refer to changes in an allele s frequency due to any form of selection operating upon linked genes, including background selection against deleterious mutations. Whether a neutral allele becomes Fixation population genetics fixed is a matter of chance. The traditional view of this stochastic process is that it is dominated by sampling error, that is genetic drift . But it may instead be dominated by whether the allele is linkage disequilibrium linked to a good genetic background this is known as genetic draft. ref Cite journal volume 55 issue 11 pages 2161 2169 last Gillespie first John H. title Is the population size of a species relevant to its evolution? journal Evolution year 2001 pmid 11794777 url http www.ufscar.br evolucao popgen ref12 6.pdf ref Advantage to mutators Consider a hypothetical mutator allele that increases the mutation mutation rate in the area around it. M A On this chromosome the gene M is a mutator allele, increasing the rate of mutation in the surrounding area. A is an allele which is Fixation population genetics fixed ... processes of evolution natural selection . M, due to its proximity to A , will also increase ... created by mutation. A greater distance would increase the chance of genetic recombination recombination ..., hitchhiking on beneficial mutations is most likely to affect the evolution of mutation ... more details
Genetic variability is a measure of the tendency of individual genotype s in a population to vary from one another. Variability is different from genetic diversity , which is the amount of variation seen ... and genetics genetic influences. ref name YAL1995 Genetic variability in a population is important .... 2011. Genetic diversity of Maghrebian Hottentotta Scorpiones Buthidae scorpions based on CO1 new ... . Variability is an important factor in evolution as it affects an individual s response to environmental ... selection of the most fit variants. Genetic variability also underlies the differential susceptibility ... the extent of human genetic variation such as the International HapMap Project HapMap project . Causes There are many sources of genetic variability in a population br Homologous recombination is a significant ... the male and female parents cross over one another and exchange genetic material. The chromosomes ..., and the Efficacy of Selection Was Weismann Right? journal Evolution International Journal of Organic Evolution issue 54.2 year 2000 pages 337 351 ref Immigration , emigration , and Species ... it will increase the genetic variability of the next generation if it reproduces. ref name EHR2005 cite journal author Ehrich, Dorothy and Per Erik Jorde title High Genetic Variability Despite High ... allows for even more recombination during meiosis allowing for even more genetic variability in one ... is an exact genetic copy of the parent, there are limited sources of genetic variability. One thing ... and Janet Gehring title Genetic Variability and its Ecological Implications in the Clonal Plant Carex ... Genetic mutations &ndash contribute to the genetic variability within a population and can have positive ... title Genetic Variability publisher NewYork Oxford University Press year 1980 ref This variability .... However, the smaller a population and its genetic variability are, the more likely the recessive hidden deleterious mutations will show up causing genetic drift . ref name WIL1980 See also Evolvability ... more details
Refimprove date October 2007 Genetic anthropology is a new branch of scientific study which deals with combining DNA data with available physical evidence and past histories of civilizations. This would enable scientists to glean through available genetic information that would go a long way in explaining how the modern day Homo sapiens evolved through the millennia. The Genographic Project , a joint collaboration between IBM and the National Geographic Society is a multi million dollar step in this endeavor. The database is scheduled to become publicly available from June 28, 2007 in PLoS Genetics , an open source , peer reviewed magazine. See also Cross cultural studies Anthropology Origin of the Nilotic peoples Archaeology Cross cultural researcher Human evolution Genetics External links http www.ucl.ac.uk tcga The Centre for Genetic Anthropology Departments of Anthropology and of Biology, University College London Category Anthropology Category Genetics anthropology stub genetics stub ... more details
drp.rubyforge.org DRP Directed Ruby Programming, Genetic Programming & Grammatical Evolution Library ... programming Genetic representation Grammatical evolution Fitness approximation Linear genetic programming ..., R.E., and Francone, F.D. 1998 , Genetic Programming An Introduction On the Automatic Evolution of Computer ...distinguish Genetic engineering In artificial intelligence , genetic programming GP is an evolutionary algorithm based methodology bio inspired computing inspired by biological evolution to find computer program s that perform a user defined task. It is a specialization of genetic algorithms GA where ... able to solve complex engineering problems through evolution strategies as documented in his 1971 ... of modern tree based Genetic Programming that is, procedural languages organized in tree based structures ... has pioneered the application of genetic programming in various complex optimization and search problems. ref http www.genetic programming.com genetic programming.com Home Page Bot generated title ref ... date November 2008 Program representation Image Genetic Program Tree.png frame A function represented ... genetic programming which suits the more traditional imperative languages see, for example ... assembly language . Genetic operators The main operators used in evolutionary algorithm s such as GP ... missing values. Other approaches The basic ideas of genetic programming have been modified and extended in a variety of ways Extended Compact Genetic Programming ECGP Embedded Cartesian Genetic Programming ECGP Probabilistic Incremental Program Evolution PIPE MOSES Meta Optimizing Semantic Evolutionary ... genetic populations. ref http wiki.opencog.org w Meta Optimizing Semantic Evolutionary Search OpenCog MOSES ref It has been shown to strongly outperform genetic and evolutionary program learning systems ... convergence. Meta Genetic Programming Meta Genetic Programming is the proposed meta learning computer science meta learning technique of evolving a genetic programming system using genetic programming ... more details
Genetic admixture occurs when individuals from two or more previously separated populations begin interbreeding. Admixture results in the introduction of new genetic lineages into a population. It has been known to slow local adaptation by introducing foreign, unadapted genotypes known as gene swamping . It also prevents speciation by homogenizing populations. Genetic admixture often occurs when a geographic barrier separating populations, such as a river or isthmus , is removed or when anthropogenic activities result in movement of populations for example invasive species . One example of genetic admixture resulting from the introduction of an invasive species is provided by the Cuban brown anole . Several isolated populations of this species exist in the native range of Cuba . However in the introduced range of Florida , these populations freely interbreed, forming an admixed population. See also Racial admixture Gene flow Hybrid biology Hybrid Admixture mapping References cite book title Handbook of statistical genetics, Volume 1 year 2007 chapter Glossary of Genetic Terms chapterurl http books.google.com books?id hFjNvMWBk14C&pg PR37&dq genetic admixture glossary&as brr 3&ei wzLPSrmlFJu0zATioNXFBg v onepage&q genetic 20admixture 20glossary&f false isbn 0470058307 last Balding cite book title Applied Statistical Genetics With R For Population based Association Studies last Foulkes year chapter Glossary of Terms chapterurl http books.google.com books?id gwW8jArHnwwC&pg PT250&dq genetic admixture glossary&lr &as brr 3&ei GzPPStH7C6SCywTZ5rCzBg v onepage&q &f false isbn 0387895531 pages 250 cite book title Genes, culture, and human evolution a synthesis year 2007 chapter Glossary of Terms chapterurl http books.google.com books?id zdeWdF NQhEC&pg PA298 v onepage&q &f false ... Genetic Variation Increases during Biological Invasion by a Cuban Lizard . Nature 431 171 181 Lenormand T 2002 . Gene flow and the limits to natural selection . Trends in Ecology and Evolution. 17 183 ... more details
concerns There is some concern that genetic enhancement could affect human evolution . ref http www.genome.gov 10004767 ref In response, geneticists have pointed out that human evolution will likely ... are actually passed on, evolution in memes may occur if genetic modification of parents improved ...Essay date May 2009 Refimprove date May 2009 Genetic enhancement refers to the use of genetic engineering ... therapy involves using genetic engineering to alter defective genes or insert corrected genes into the body ... genetic enhancement and gene therapy . However, whether a genetic modification procedure is deemed ... of the genetic alteration. But the classification of the goal will necessarily depend on how disease or normal is defined. Genetic enhancement in humans If genetic enhancement is defined such that it includes drugs that are made with genetic knowledge or using rDNA techniques, then forms of genetic ... n6570 pdf 380113a0.pdf ref Using the results of genetic tests to make reproduction reproductive decisions based on non disease traits could be considered to be a form of passive genetic enhancement ... of host genetic material, and a five to ten percent frequency of insertional mutagenesis . ref http ... transfer will not result in a heritability heritable genetic modification. Germ line gene transfer, on the other hand, will produce transmittable genomic changes. Concerns regarding genetic enhancement A number of concerns are raised by genetic enhancement. The concerns are based on ideas of equality ... of Social Equality An issue that arises in the context of genetic enhancement is the provision of equal access to genetic enhancement technologies. The high cost of genetic enhancement could prevent all but the wealthy from gaining access to enhancement procedures. Wealth based genetic enhancement ... justice notions issues would arise, as the net effect of genetic enhancement procedures felt by those ... who cannot afford genetic enhancement procedures. The costs associated with the procedures would ... more details
Note Genetic assimilation is sometimes used to describe eventual extinction of a natural species as massive ... crop. ref http www.biochem.northwestern.edu holmgren Glossary Definitions Def G genetic assimilation.html ref This usage is unrelated to the usage below. Genetic assimilation is a process by which the effect .... Genetic assimilation is merely a method of overcoming the barrier to selection imposed by genetic ... pathway, genetic variation of pathway components results in a continuous spectrum of phenotypes ... of their genotype under normal environmental circumstances. However, a given genetic make up does ... breeding these are said to phenocopy the desired genetic trait. With several generations of artificial selection in this manner, perhaps aided by mutagenesis , the genetic variation can be reduced to that of the furthest ... duplicated genetically. Image canalization problem.png thumb 350 px right The classic example of genetic ... Genetic 20assimilation title A Conceptual History of Modern Embryology publisher Plenum Press location ... without ether treatment. Genetic assimilation in natural selection It has not been proven that genetic assimilation occurs in natural evolution, but it is difficult to rule it out from having at least ... CJ title Perspective Genetic assimilation and a possible evolutionary paradox can macroevolution sometimes be so fast as to pass us by? journal Evolution volume 57 issue 7 pages 1455 64 year 2003 ... modeling suggests that under certain circumstances, natural selection will favor the evolution ... I, Matessi C title Canalization, genetic assimilation and preadaptation. A quantitative genetic model ... by natural selection, genetic assimilation will occur. In the 1960s C. H. Waddington and J. M. Rendel argued for the importance of genetic assimilation in natural adaptation as a means of providing ... argued that genetic assimilation proceeds at the cost of a loss of developmental plasticity, and should be a minor mechanism. If it occurs frequently, genetic assimilation could contribute to punctuated ... more details
. A species that has a large degree of genetic diversity among its population will have more variations from which to choose the most fit alleles. Increase in genetic diversity is also essential for a species to evolution evolve . Species that have very little genetic variation are at a great risk ...Evolutionary biology Genetic Diversity , the level of biodiversity , refers to the total number of Genetics genetic characteristics in the genetic makeup of a species. It is distinguished from genetic variability , which describes the tendency of genetic characteristics to vary. Genetic diversity serves ... to Genetic Diversity publisher U.S. Geological Survey url http www.nbii.gov portal server.pt ... genetics includes several hypotheses and theories regarding genetic diversity. The neutral theory of evolution proposes that diversity is the result of the accumulation of neutral substitutions ... to overcome that allele. Importance of genetic diversity There are many different ways to measure genetic diversity. The modern causes for the loss of animal genetic diversity have also been studied ... Clem Tisdell year 2003 title Socioeconomic causes of loss of animal genetic diversity analysis ... by the National Science Foundation found that genetic diversity and biodiversity Biodiversity ... http www.enn.com animals article 23391 Study Loss Of Genetic Diversity Threatens Species Diversity ref The interdependence between genetic and biological diversity is delicate. Changes in biological ... in genetic diversity, such as in loss of species, leads to a loss of biological diversity. ref name U.S. Geological Survey Survival and adaptation Genetic diversity plays a very important role in survival ..., and offspring often deal with similar problems to those of inbreeding . ref Genetic Diversity ... of a population to certain types of disease s can also increase with reduction in genetic diversity ... breeding leads to monocultures entire farms of nearly genetically identical plants. Little to no genetic ... more details
techniques inspired by natural evolution, such as Heredity inheritance , Mutation genetic algorithm mutation , selection genetic algorithm selection , and crossover genetic algorithm crossover . Methodology In a genetic algorithm, a population of strings called chromosome genetic algorithm chromosomes ... 262 11170 5 Michalewicz, Zbigniew 1999 , Genetic Algorithms Data Structures Evolution Programs , Springer ...Merge from Genetic algorithms in economics date December 2010 In the computer science field of artificial intelligence , a genetic algorithm GA is a Search algorithm search heuristic that mimics the process of natural evolution. This heuristic is routinely used to generate useful solutions to Optimization mathematics optimization and Search algorithm search problem s. Genetic algorithms belong to the larger ... are represented in binary as strings of 0s and 1s, but other encodings are also possible. The evolution ... solution may or may not have been reached. Genetic algorithms find application in bioinformatics ... , mathematics , physics and other fields. A typical genetic algorithm requires a genetic representation ... in essentially the same way. The main property that makes these genetic representations convenient ... complex in this case. Tree like representations are explored in genetic programming and graph form representations are explored in evolutionary programming . The fitness function is defined over the genetic ... evolutionary computation interactive genetic algorithms are used. Once the genetic representation ... Main Selection genetic algorithm During each successive generation, a proportion of the existing population is selection genetic algorithm selected to breed a new generation. Individual solutions ... genetic algorithm Mutation genetic algorithm The next step is to generate a second generation population of solutions from those selected through genetic operator s crossover genetic algorithm crossover also called recombination , and or mutation genetic algorithm mutation . For each new solution ... more details
Genetic redundancy is a term typically used to describe situations where a given biochemical function is redundantly encoded by two or more gene s. In these cases, mutation s or defects in one of these genes will have a smaller effect on the fitness of the organism than expected from the genes function. Characteristic examples of genetic redundancy include Enns, Kanaoka et al. 2005 and Pearce, Senis et al. 2004 . Many more examples are thoroughly discussed in Kafri, Levy & Pilpel. 2006 . The main source of genetic redundancy is the process of gene duplication which generates multiplicity in gene copy number. A second and less frequent source of genetic redundancy are convergent evolution ary processes leading to genes that are close in function but unrelated in sequence Galperin, Walker & Koonin 1998 . Genetic redundancy has classically aroused much debate in the context of evolutionary biology Nowak et al., 1997 Kafri, Springer & Pilpel . 2009 . From an evolutionary standpoint, genes with overlapping functions implies minimal, if any, selective pressure s acting on these genes. One therefore expects that the genes participating in such buffering of mutations will be subject to severe mutational drift diverging their functions and or expression patterns with considerably high rates. Indeed it has been shown that the functional divergence of paralogous pairs in both yeast and human is an extremely rapid process. Taking these notions into account, the very existence of genetic buffering, and the functional redundancies required for it, presents a paradox in light of the evolutionary concepts. On one hand, for genetic buffering to take place there is a necessity for redundancies of gene function, on the other hand such redundancies are clearly unstable in face of natural selection ... utilization of genetic redundancy through responsive backup circuits. Proc Natl Acad Sci U S A 103 ... M, Pilpel Y. Genetic redundancy new tricks for old genes. Cell. 2009 Feb 6 136 3 389 92. Category ... more details
evolution popgen Genetic engineering DEFAULTSORT Genetic Pollution Category Ecology Category Conservation ...Over quotation date November 2011 Genetic pollution is a controversial ref name mixing ref name heartland term for uncontrolled ref name Genetic Pollution in Italian Wolfs 1983 ref Norman C. Ellstrand ... name GE agriculture and genetic pollution http www.greenpeace.org international campaigns genetic engineering ge agriculture and genetic pol GE agriculture and genetic pollution web article hosted ... no to genetic pollution Greenpeace, Say no to genetic pollution n.d. http www.greenpeace.org ref ref name 1994 . Bid to protect wolves from genetic pollution. Nature ref name TRAFFIC Usage Some Conservation biology conservation biologists and conservationists have used genetic pollution for a number ... population. ref name Genetic Pollution in Italian Wolfs 1983 http query.nytimes.com gst fullpage.html ... disparity in numbers, which suggests that interbreeding will become fairly common. As a result, genetic ... R. E. 2003 Corrigendum to TURNER REVIEW No. 6 Genetic pollution of native eucalypt gene pools identifying ... . Bid to protect wolves from genetic pollution. Nature Butler D. 1994 . Bid to protect wolves from genetic pollution. Nature 370 497 doi 10.1038 370497a0 ref dubious date February 2012 reason Two of three ... flow from a Genetic engineering genetically engineered GE organism to a non GE organism, ref name FAO document1 frequently by those disapproving of such gene flow. ref name GE agriculture and genetic ... wild indigenous species , which they consider undesirable. ref name Genetic Pollution in Italian Wolfs 1983 ref name potts ref name 1994 . Bid to protect wolves from genetic pollution. Nature ... genetic pollution . ref name TRAFFIC http www.traffic.org wildlife wild6.htm When is wildlife trade ... species, causing genetic pollution . In these ways, invasive species are as big a threat to the balance ... advised that invasive species will alter the genetic pool a process called genetic pollution , which ... more details
to its evolution? journal Evolution year 2001 pmid 11794777 ref Genetic draft is the effect ... year 2002 pages 364 isbn 0 06 095850 2 ref Although both processes affect evolution, genetic drift ..., guiding evolution towards heritable adaptation s to the current environment, genetic drift has ... www.pbs.org wgbh evolution library 06 3 l 063 03.html title Genetic Drift and the Founder Effect ... 1998 320 The role of genetic drift by means of sampling error in evolution has been criticized by John ... evolution bboard q and a fetch msg.tcl msg id 000190&topic id 54&topic Genetic Draft.html Drift vs. Draft evolution popgen Use dmy dates date January 2011 DEFAULTSORT Genetic Drift Category Population ...Distinguish antigenic drift antigenic shift Good article Evolutionary biology Genetic drift or allelic ... Genetic drift journal Current Biology year 2011 doi 10.1016 j.cub.2011.08.007 url http www.sciencedirect.com ... ref Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation . When there are few copies of an allele, the effect of genetic drift is larger, and when there are many ... selection versus neutral processes, including genetic drift. Ronald Fisher held the view that genetic drift plays at the most a minor role in evolution, and this remained the dominant view for several decades. In 1968 Motoo Kimura rekindled the debate with his neutral theory of molecular evolution , which claims that most instances where a genetic change Fixation population genetics spreads across a population although not necessarily changes in phenotypes are caused by genetic drift. ref name ... generation. Genetic drift is weaker in large populations the frequency of an allele ... cans, it might only take a few iterations before they are all the same color. Genetic drift thus tends ... genetic diversity . ref cite web url http evolution.berkeley.edu evosite evo101 IIID1Samplingerror.shtml title Evolution 101 Sampling Error and Evolution work University of California Berkeley accessdate ... more details
A genetic marker is a gene or DNA sequence with a known location on a chromosome that can be used to identify ... or alteration in the genomic loci that can be observed. A genetic marker may be a short DNA sequence ... by traditional genetic markers which include genes that encode easily observable characteristics ... for gene probing Some commonly used types of genetic markers are RFLP or Restriction fragment ... different genetic maps but, for their development it is necessary to know the sequence which is still expensive and is considered one of their down sides . Uses Genetic markers can be used to study the relationship between an inherited disease and its Genetics genetic cause for example, a particular ... been exactly localized. Genetic markers have to be easily identifiable, associated with a specific ... length polymorphism AFLP , RAPD, SSR. They can be used to create genetic maps of whatever organism ... . With the aid of genetic markers, researchers were able to provide conclusive evidence that the cancerous tumor cell evolved into a transmissible parasite. Furthermore, molecular genetic ... A, Weiss RA. Clonal origin and evolution of a transmissible cancer. Cell. 2006 Aug 11 126 3 477 87. ref Genetic markers have also been used to measure the genomic response to selection in livestock. Natural and artificial selection leads to a change in the genetic makeup of the cell. The presence of different alleles due to a distorted segregation at the genetic markers is indicative of the difference between selected and non selected livestock. ref Rayaa, G. et al. 2002. The Use of Genetic Markers ... Genetic markers also play a role in genetic engineering , as they can be used to produce normal ... number of which take up the genetic material and reproduce the new DNA sequence. Engineers need to know ... and Institute for Genetic Diversity, Ithaca, New York, USA. url http www.bioversityinternational.org ... for Genetic Diversity, Ithaca, New York, USA. url http www.bioversityinternational.org training training ... more details
Multiple issues copy edit November 2011 expert subject October 2011 refimprove August 2007 Genetic erosion ... to meet and breed with others in their endangered Small population size low population . Genetic erosion ... getting a chance to breed. Low genetic diversity in a population of wild animals and plants leads ... of genetic erosion and most need a human assisted breeding program to keep their population viable ... the effect of genetic erosion gets when each surviving individual of the species is lost without getting a chance to breed. Genetic erosion gets compounded and accelerated by habitat fragmentation ... s that would be found by inspecting the genetic material of every living member of that species or population. A large gene pool indicates extensive genetic diversity , which is associated with robust populations that can survive bouts of intense selection . Meanwhile, low genetic diversity see inbreeding ... gene pool that leaves fewer and fewer mating partners. What are the genetic implications? The animals ... are the genetic implications? The animals become part of a high stakes poker game with a crooked ... the threat of an epidemic that could well be fatal to the entire population. title GENETIC EROSION ... in Norway ref Genetic erosion in agricultural and livestock biodiversity See also Agricultural biodiversity Genetic erosion in agricultural and livestock biodiversity is the loss of genetic diversity ... to the natural environment in which they originated. The term genetic erosion is sometimes used ... of varieties or even species. The major driving forces behind genetic erosion in crops are variety ... ecosystem management is the general tendency towards genetic and ecological uniformity imposed by the development ... genetic erosion In situ conservation With advances in modern science several techniques and safeguards have emerged to check the relentless advance of genetic erosion and the resulting acceleration ... ultra modern ex situ conservation techniques have emerged for saving the genetic biodiversity ... more details
Genetic variant may refer to A single nucleotide polymorphism SNP , in case it is a common genetic variant A mutation , in case it is a rare genetic variant A copy number variation disambiguation ... more details
A genetic lineage is a series of mutations which connect an ancestral genetic type allele , haplotype , or haplogroup to derivative type. ref name urlThe Genographic Project Human Migration, Population Genetics, Maps, DNA National Geographic cite web url https genographic.nationalgeographic.com genographic index.html title The Genographic Project Human Migration, Population Genetics, Maps, DNA National Geographic work accessdate ref In cases where the genetic tree is very bushy the order of mutations in the lineage is mostly known, examples are the order of mutations between E1b1b and E1b1b1a 1a for the Human Y chromosome DNA haplogroup human Y chromosome . In other instances the order of mutations may not be known, an example is the sequence of mutations between the Mitochondrial eve L0 L1 split for human mitochondrial DNA and the basal Haplogroup L0 mtDNA L0 or Haplogroup L1 mtDNA L1 nodes. ref name Gonder07 citation last1 Gonder first1 MK last2 Mortensen first2 HM last3 Reed first3 FA last4 de Sousa first4 A last5 Tishkoff first5 SA title Whole mtDNA genome sequence analysis of ancient African lineages journal Mol. Biol. Evol volume 24 issue 3 pages 757 68 year 2007 month December pmid 17194802 doi 10.1093 molbev msl209 ref A genetic lineage can be contrasted with an lineage evolution evolutionary lineage in that a genetic lineage applies to a locus. An example of the difference is that ancient African ape evolved into proto gorilla and a chimpanzee human ancestor, which further evolved into chimps and humans. While most human lineages Coalescence coalesce with chimpanzee lineages, which then converge with gorilla lineages, a few human lineages coalesce with gorilla lineages and then converge with chimpanzee lineages or chimpanzee lineages that coalesce with gorilla lineages and then converge with human lineages . This occurs because the speciation that marks evolutionary ... fixation at any time. Basal lineage In genetics a basal lineage is a genetic lineage that connects ... more details
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