# Hardy Weinberg Law and Use

 Hardy Weinberg idea Sexual recombination alone cannot change relative frequencies of alleles or genotypes in population over repeated matingsi.e. Meiosis alone does not chance overall gene poolTherefore changes come from hardy weinberg conditions Hardy Weinberg Conditions (stated positively, so reflecting the actual condition, not ideal) Changes in the gene pool results from:emmigration/immigrationSmall populationNet mutationsNon random matingNatural SelectionWithout conditions above, genotype frequencies and alleles remains the same in the next generation Hardy Weinberg Probabilities Ex: p=Dom allele = A=.8 q= Rec Allele= a=.2 Frequency of allele p or qFrequency of genotype=  P(AA)=.8*.8=.64P(aa)=.2*.2=.04P(Aa)=(.8*.2)*2=.16*2=.32 P(Aa) is times 2 because if heterozygous because sperm or egg has to donate one (they have to have one) Also P(AA)+P(Aa)+P(aa) must equal one Authorrica_ross ID236844 Card SetHardy Weinberg Law and Use DescriptionBiology GRE Updated2013-09-25T00:03:21Z Show Answers