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Encyclopedia results for Genetic distance

Genetic distance





Encyclopedia results for Genetic distance

  1. Genetic distance

    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 .... title SAMPLING VARIANCES OF HETEROZYGOSITY AND GENETIC DISTANCE url http www.genetics.org cgi content ... on genetic distance http helix.biology.mcmaster.ca brent node7.html The Estimation of Genetic ... 1996 , McMaster University website on genetic distance http nitro.biosci.arizona.edu ftDNA Distance.html Computing distance by stepwise genetic distance model, web pages of Bruce Walsh at the Department ... indels. PNAS 2002 13633 br DEFAULTSORT Genetic Distance Category Phylogenetics evolution stub ...   more details



  1. Genetic

    wiktionary genetic Genetic 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



  1. The Distance

    The Distance may refer to The distance boxing , a boxing match that lasts the maximum number of scheduled rounds The Distance The O.C. The Distance The O.C. , an episode of The O.C. The Distance film The Distance film , a 2006 independent documentary directed by Ash Adams The Distance , a novel by Eddie Muller The Distance Agency , a digital agency based in the UK In music The Distance Bob Seger album The Distance Bob Seger album The Distance Taylor Hicks album The Distance Taylor Hicks album The Distance song The Distance song , a song by Cake The Distance , a song by Bon Jovi from Bounce Bon Jovi album Bounce The Distance , an album by Geoff Moore also the name of Moore s backing band See also Distance disambiguation disambig it The Distance ...   more details



  1. Genetic relationship

    Genetic relationship may refer to Genetic distance , in genetics Genetic relationship linguistics , in language disambig Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ...   more details



  1. Genetic hitchhiking

    created by mutation. A greater distance would increase the chance of genetic recombination recombination ...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 in the population. Due to the increased mutation rate, the A allele may be mutated into a new, advantageous allele, A . M A The individual in which this chromosome lies will now have a selective advantage ...   more details



  1. Genetic linkage

    it is possible to obtain a measure for the distance between the genes. This distance is called a genetic map unit m.u. , or a centimorgan and is defined as the distance between genes for which one .... As the likelihood of a double crossover increases we systematically underestimate the genetic distance ...Genetic linkage is the tendency of certain Locus genetics loci or alleles to be inherited together. Alleles ... distance between two genes can be calculated by taking the offspring of an organism showing two linked genetic traits, and finding the percentage of the offspring where the two traits do not run together ... to be linked. Genetic linkage can also be understood by looking at the relationships among phenotypes ... enough distance on the same chromosome that recombination occurs at least half of the time. The latter is known as genetic linkage. This occurs as an exception to independent assortment, and develops ... are inherited together because they appear on the same chromosome. Discovery Genetic linkage was first ... . The understanding of genetic linkage was expanded by the work of Thomas Hunt Morgan . Morgan ... frequency might indicate the distance separating genes on the chromosome . Alfred Sturtevant , a student of Morgan s, first developed genetic maps, also known as linkage maps. Sturtevant proposed that the greater the distance between linked genes, the greater the chance that non sister ... to Genetic Analysis. Griffiths, A. J. F. Miller, J. H. Suzuki, D. T. Lewontin, R. C. Gelbart, W ... A linkage map is a genetic map of a species or experimental population that shows the position of its known genes or genetic markers relative to each other in terms of recombination frequency, rather than a specific physical distance along each chromosome. Linkage mapping is critical for identifying the location of genes that cause genetic diseases. A genetic map is a map based on the frequencies ... chromosome s. The greater the frequency of recombination segregation between two genetic ...   more details



  1. Genetic variant

    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



  1. Genetic operator

    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



  1. Genetic genealogy

    genetic genealogy Genetic genealogy is the application of genetics to Genealogy traditional genealogy . Genetic genealogy involves the use of genealogical DNA test ing to determine the level of Genetic distance individuals genetic relationship between individuals. History Image George Darwin sepia tone.jpg ... a common set of genetic markers and should perhaps preserve some family resemblance to each other .... In April 2000, Family Tree DNA began offering the first genetic genealogy tests to the public ..., genetic genealogy as a field began growing rapidly. By 2003, the field of DNA testing of surnames ... dramatically. ref http www.bellaonline.com articles art12474.asp Guido Deboeck, Genetic Genealogy Becomes Mainstream , BellaOnline, accessed 19 Feb 2009 ref Another milestone in the acceptance of genetic ... of genetic genealogy. ref https www3.nationalgeographic.com genographic The Genographic ... not discriminating enough to provide conclusive results for a common surname. Genetic laboratories ... index.php Genebase , Genetic Genealogy, accessed 19 Feb 2009 ref Annual sales of genetic ... big is the genetic genealogy market How Big Is the Genetic Genealogy Market? , The Genetic Genealogist ... The two most common types of genetic genealogy tests are Y chromosome Y DNA paternal line and Mtdna ... and ancient via SNPs genetic ancestry. A Y chromosome STR test will reveal a haplotype , which should ... haplogroup , which defines a much larger genetic population. mtDNA testing involves sequencing .... Genetic genealogy has revealed astonishing links between peoples. For instance, it has shown that the ancient ... this science to the public. One example, mentioned in Genetic genealogy History History above .... Another example is the DNA Clans Genetic Ancestry Analysis, which measures a person s precise genetic connections to indigenous ethnic groups from around the world. ref http www.genebase.com in dnaClansPopulation.php ... of genetic genealogy. Citation needed date March 2009 Paternal and maternal DNA lineages ...   more details



  1. Genetic recombination

    Genetic recombination is a process by which a molecule of nucleic acid usually DNA , but can also be RNA is broken and then joined to a different one. Recombination can occur between Homology biology similar molecules of DNA, as in homologous recombination , or dissimilar molecules, as in non homologous ... immune system , a type of genetic recombination called V D J recombination helps immune cells rapidly diversify to recognize and adapt to new pathogen s. The shuffling of genes brought about by genetic recombination is thought to have many advantages, as it is a major engine of genetic variation ... s of an Asexual reproduction asexual population accumulate genetic deletion deleterious mutations in an irreversible manner. In genetic engineering , recombination can also refer to artificial and deliberate ... recombinant DNA . A prime example of such a use of genetic recombination is gene targeting , which ... on genetic recombination are also applied in protein engineering to develop new proteins of biological interest. Genetic recombination is catalysis catalyzed by many different enzyme s, called recombinase ... exchange genetic information. ref name Alberts cite book last Alberts first Bruce title Molecular ..., the recombination frequency frequency of recombination between two locations depends on their distance ... causing gene. ref Cite web title Access Excellence work Crossing over Genetic Recombination publisher The National Health Museum Resource Center url http www.accessexcellence.org RC AB BC Genetic .... In gene conversion, a section of genetic material is copied from one chromosome to another, without ... Immunoglobulin class switching B cells of the immune system perform genetic recombination, called ... links http www.ncbi.nlm.nih.gov books NBK22099 The Holliday Model of Genetic Recombination MeshName Genetic recombination http www.blackwellpublishing.com trun artwork Animations Recombination recombination.html Animated guide to homologous recombination. References Reflist NCBI scienceprimer Genetic ...   more details



  1. Genetic algorithm

    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 ... mathematics optimization and Search algorithm search problem s. Genetic algorithms belong to the larger ... 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 ... 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 ... biology inspired , some research ref Eiben, A. E. et al 1994 . Genetic algorithms with multi parent ... Ting, Chuan Kang 2005 . On the Mean Convergence Time of Multi parent Genetic Algorithms Without Selection ..., for reasons already mentioned above. Although Crossover and Mutation are known as the main genetic ...   more details



  1. Genetic memory

    Genetic memory may refer to Genetic memory biology , present if the state of a biological system depends on its history in addition to present conditions Genetic memory psychology , a memory present at birth that exists in the absence of sensory experience Genetic memory computer science , an artificial neural network combination of genetic algorithm and the mathematical model of sparse distributed memory disambig ar es Memoria gen tica pl Pami genetyczna ...   more details



  1. Genetic analysis

    about analysis of the linkage of trait biology traits due to the spatial arrangement of genes on the chromosome , an analysis which dates back to classical genetics Genetic linkage analysis of codons as defined through research on nucleic acids , which is often classed with reverse genetics Genetic code analysis of maternal inheritance related to mitochondrial DNA Mitochondrial DNA Mitochondrial inheritance medical, genealogy genealogical , legal and security applications of genetic research that are mainly directed at humans Genetic testing Genetic analysis can be used generally to describe methods both used in and resulting from the sciences of genetics and molecular biology , or to applied research applications resulting from this research. Genetic analysis may be done to identify genetic inherited disorders and also to make a differential diagnosis in certain somatic diseases such as cancer . Genetic analyses of cancer include detection of mutation s, fusion gene s, and DNA copy number changes. Genetic analyses include but are not limited to molecular technologies such as PCR , RT PCR , DNA sequencing , and DNA microarrays , and cytogenetics cytogenetic methods such as karyotyping and fluorescence in situ hybridisation . Category Genetics genetics stub ...   more details



  1. Genetic representation

    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



  1. Genetic drift

    diverge significantly over the course of many generations. As the difference, or genetic distance ...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 ... , 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 ... 2009 11 01 ref File Random sampling genetic drift.gif thumb center 550px In this simulation ... and allele frequency The mechanisms of genetic drift can be illustrated with a simplified example ... 1 2 right 4 6 cdot frac 1 16 frac 6 16 math Genetic drift occurs when a population s allele frequencies ... than the probability that it will remain the same 6 16 . Mathematical models of genetic drift Mathematical models of genetic drift can be designed using either branching process es or a diffusion equation ... give qualitatively similar results, but genetic drift runs twice as fast in the Moran model. Other models ... distribution assumed by the Wright Fisher model, then given the same overall speed of genetic drift the Effective population size Variance effective size variance effective population size , genetic ... of the binomial distribution then again the force of genetic drift is substantially weakened. ref ...   more details



  1. Genetic gain

    Genetic gain is the amount of increase in performance that is achieved through artificial Genetic engineering genetic improvement programs. This is usually used to refer to the increase after one generation has passed. ref College of Agriculture, http www.ca.uky.edu agripedia glossary genegain.htm Genetic Gain University of Kentucky , accessed 2010 11 23 ref References Reflist colwidth 60em Category Biology Category Genetics Category Agriculture ...   more details



  1. Genetic program

    Unreferenced auto yes date December 2009 In biology , a genetic program of a cell is a physiology physiological change brought about by a temporal pattern of Transcription genetics activation of a particular subset of gene s. DEFAULTSORT Genetic Program Category Genetics Genetics stub ...   more details



  1. Genetic ablation

    unreferenced date March 2011 Genetic ablation is a method of modifying DNA in order to disrupt the production of a specific gene. As genetic ablation may lead to Cell ablation , it can be used as a synonymous term at appropriate times. Category Genetics experiments genetics stub ...   more details



  1. Genetic divergence

    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



  1. Genetic variation

    no footnotes date August 2010 Image wheat.gif right thumb Genetic variation , variation in allele s of gene s, occurs both within and among population s. Genetic variation is important because it provides the raw material for natural selection . Genetic variation is brought about by mutation, which is a change ... is a condition wherein organisms have three or more sets of genetic variation 3n or more . Among individuals within a population Genetic variation among individuals within a population can be identified at a variety of levels. It is possible to identify genetic variation from observations of phenotype ... . Genetic variation can also be identified by examining variation at the level of enzyme s using ... are less common in vertebrates. Ultimately, genetic variation is caused by variation in the order ... DNA which has identified even more genetic variation than was previously detected by protein electrophoresis. Examination of DNA has shown genetic variation in both coding regions and in the non coding intron region of genes. Genetic variation will result in phenotypic variation if variation in the order ... may be due to differences in selective pressures or to genetic drift . Measurement Genetic variation ... of genetic variation because they alter the order of bases in the nucleotides of DNA. Mutations ... alleles can be favored by natural selection. Genetic variation can also be produced by the recombination ... by transposable and transposed genetic elements, commonly known as endogenous retroviruses, LINEs, SINEs, etc. Maintenance in populations A variety of factors maintain genetic variation in populations ... common zygosity homozygous individuals . Natural selection can also maintain genetic variation in balanced ... is frequency dependent. See also Genetic diversity Human genetic variation References Reflist Further reading McGinley, Mark Lead Author J. Emmett Duffy Topic Editor . 2008. Genetic variation ... Genetic variation http books.google.com books?id gIGyZHHmK98C&pg PA7 Genetic Variation in Griffiths ...   more details



  1. Genetic correlation

    Genetic correlation is the proportion of variance that two traits share due to gene tic causes. ref Neale, M. C., & Maes, H. H. 1996 . Methodology for genetics studies of twins and families 6th ed. . Dordrecht, The Netherlands Kluwer. ref Outside the theoretical boundary case of traits with zero heritability , the genetic correlation of traits is independent of their heritability i.e., two traits can have a very high genetic correlation even when the heritability of each is low and vice versa. The genetic correlation, then, tells us how much of the genetic influence on two traits is common to both if it is above zero, this suggests that the two traits are influenced by common genes . This can be an important constraint on conceptualizations of the two traits traits which seem different phenotypically but which share a common genetic basis require an explanation for how these genes can influence both traits. Computing the genetic correlation Estimates of a genetic correlation obviously require a genetically informative sample, such as a twin study . Given a genetic covariance matrix, the genetic correlation is computed by standardizing this, i.e., by converting the covariance matrix ... genetic variance covariance matrix table border 0 cellspacing 5 cellpadding 5 tr td td td Height ... Then the genetic correlation is .55, as seen is the standardized matrix below table border 0 cellspacing ... are used to calculate both the genetic covariance matrix and its standardized form. In R programming language R , cov2cor will standardize the matrix. Typically, published reports will provide genetic ... for computing the genetic covariance the variance within the genetic covariance matrix is lost because of the standardizing process , so you cannot readily estimate the genetic correlation of two traits ..., allow the viewer to see shared genetic effects as opposed to the genetic correlation by following .... See also Quantitative genetics Heritability References references DEFAULTSORT Genetic Correlation ...   more details



  1. Genetic Alliance

    Image GAcolor3002cm.jpg 200px thumb Genetic Alliance official logo newsrelease date March 2011 Genetic Alliance is the world s leading Non profit organization nonprofit health advocacy organization committed to improving health through the authentic engagement of communities and individuals. The organization was founded by Joan O. Weiss, a social work er, working with Victor A. McKusick , in 1986 four years before the Human Genome Project was launched. The Genetic Alliance network includes all Stakeholder corporate stakeholder s in the genetics and health community, including disease specific organizations, healthcare providers, professional societies, industry groups, academic institutions, researchers, policymakers, and consumers. President and Chief Executive Officer Sharon Terry leads the Genetic Alliance staff, Council, and network on an innovative journey of novel partnerships, connected consumers, and smart services. Biobank Genetic Alliance manages a biobank . ref http www.biobank.org ref fact date November 2011 References reflist External links http www.geneticalliance.org Genetic Alliance Home Page http www.ncbi.nlm.nih.gov sites ga Genetic Alliance Resources hosted by NCBI http www.biobank.org GA s biobank http www.youtube.com watch?v U0ES0yDWryM video on Genetic Alliance s biobank http www.geneticalliance.org Category Medical and health organizations by medical condition Category Biobank organizations ...   more details



  1. Genetic isolate

    Unreferenced date April 2008 Expert subject Genetics date April 2008 A genetic isolate is population of organisms that has little genetic mixing with other organisms within the same species. This may result in speciation , but this is not necessarily the case. Genetic isolates may form new species in several ways allopatric speciation , in which two populations of the same species are geographically isolated from one another by an extrinsic barrier, and evolve intrinsic genetic reproductive isolation peripatric speciation , in which a small group of a population is separated from the main population, and experiences genetic drift parapatric speciation , in which zones of two diverging populations are separate, but do overlap somewhat partial separation is afforded by geography, so individuals of each species may come in contact from time to time, but selection for specific behaviours or mechanisms may prevent breeding between the two groups. sympatric speciation , a contentious method of speciation in which species diverge while inhabiting the same place. Human influences on genetic isolates include restricted Dog breeding breeding of dogs , or a community living secluded away from others such as Tristan da Cunha or Pitcairn Islands . A far larger and less secluded human genetic isolate is the ethnic Finns , natives of Finland see Finnish disease heritage . See also Language isolate Linkage disequilibrium DEFAULTSORT Genetic Isolate Category Speciation ...   more details



  1. Genetic structure

    Genetic structure refers to any pattern in the genetics genetic makeup of individuals within a population. In the absence of genetic structure, one can infer little to nothing about the genetic makeup of an individual by studying other members of the population. When genetic structure is present, on the other hand, much can be inferred. In trivial terms, all populations have genetic structure, because all populations can be characterised by their genotype or allele frequencies if only 1 of a large sample of moths drawn from a single population have spotted wings, then it is safe to assume that any unknown individual is unlikely to have spotted wings. A more complicated example arises in dense thicket s of plants, where plants tend to be pollination pollinated by near neighbours, and seed s tend to fall and germination germinate near the maternal plant. In such a scenario, plants tend to be more closely related to nearby plants than they are to distant plants and yet they are more likely to breed with nearby plants than they are with distant plants. Thus an inbreeding cycle is created that perpetuates the pattern of plants being closely related to near neighbours. This is a form of genetic structure because one can infer much about the genetic makeup of any individual plant simply by studying plants in its immediately neighbourhood. Category Genetics genetics stub Unreferenced date March 2010 ...   more details



  1. Genetic determinism

    Genetic determinism is the belief that gene s, along with environmental conditions, determine morphology biology morphological and behavioral phenotype s. The term is sometimes mistakenly applied to the unscientific belief that genes determine, to the exclusion of environmental influence, how an organism turns out. As Conrad Hal Waddington CH Waddington wrote in 1957, It is of course a truism which has long been recognised that the development of any individual is affected both by the hereditary determinants which come into the fertilised egg from the two parents and also by the nature of the environment in which the development takes place. ref CH Waddington, The Strategy of the Gene , London George Allen & Unwin, 1957, p. 88 ref A related error is that genetics geneticists and molecular biology molecular biologists have only recently come to the realization that Environment biophysical .... In fact theorists and researchers long ago understood that genetic effects cannot be studied in isolation ... 39 ref Origins Genetic determinism, which identifies the gene as the biological source of morphology ... genetic mutation, not adaptations on the part of a struggling organism, could significantly alter the developmental ... on laws of physics, the other based on a genetic program. Thus the organism reflects not just the mechanics of its constituent parts but the phylogenetic history encoded in its genes. Genetic information ... and distribution of genes, genetic determinism remains the standard model. According to Nusslein ... egg, the genetic program is complete. ref Christiane Nusslein Volhard, Coming to Life How Genes Drive ... as she fleshes out a model of development based not on genetic information but the way genes are expressed ... place in the embryo on the basis of its distance from an organizer, a set of cells that influence ... References Reflist Selfish Gene External links In Our Time Genetic Determinism p005461w Genetic Determinism http www.philosophy.umd.edu Faculty PGreenspan Res gen2.html Greenspan, P.S. 1998. Free will and genetic ...   more details




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