Genetic History

Genetic History - Genetic History Hardy-Weinberg Model of...

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Genetic History Hardy-Weinberg: Model of Genetic Equilibrium- used to determine whether or not evolutionary forces are operating on the population for a given locus; observed genotype frequencies for specific traits and compare them against predicted genotype frequencies assuming no evolution is occurring Provides genetic model against which we can compare observed genotype frequencies in a population to determine whether evolution is occurring in a genetic locus Example: two alleles: dominant allele A, recessive allele a, p and q, p+q=1, both equal .5 Chances of AA-p xp=p^2 Chances of Aa-pxq=pq Chances of aA-pxq=pq=2pq Chances of aa-qxq=q^2 P^2+2pq+q^2=1 Forces of evolution: mutation, natural selection, genetic drift, gene flow, nonrandom mating (hardy-wienberg equilitbrium assumes forces are not operating) Mutation: an alteration in the genetic material, chance events, rare events, rise to new alleles, add variation to the gene pool Natural Selection-alleles that confer an increased likelihood or of survival to
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This note was uploaded on 02/13/2011 for the course ANTH 002 taught by Professor Grinker during the Fall '08 term at GWU.

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Genetic History - Genetic History Hardy-Weinberg Model of...

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