If there are two alleles A and B and the genotype frequenci

- If there are two alleles, A and B, and the genotype frequencies are 80% AA, 4% AB, and 16% BB, what is the frequency of the B allele?

Solution

Genotype frequency of AA=80% (0.80)

Genotype frequency of BB=16% (0.16)

Genotype frequency of heterozygote=4% (0.04)

Allele frequency of A= Genotype frequency of AA+1/2 of Genotype frequency of heterozygote

Allele frequency of B=Genotype frequency of BB+1/2 of Genotype frequency of heterozygote

=0.16+1/2 (0.04)

=0.18 (18%)