EphB2 that controls head crest feather development A recessi

EphB2, that controls head crest feather development. A recessive allele at this locus reverses the feathers on their head crests and basically makes them look like they have a huge cowlick. There are 100,000 pigeons in the population; 1,000 pigeons are heterozygous for the recessive trait; and 1,674 pigeons have reversed head-crest feathers. If we call the dominant allele A1 and the recessive allele A2, which of the following is closest to the frequency of the A2 allele?

Solution

Allele frequency is the proportion of all alleles at a locus that are of a specified type. From the given proportion of the current allele that the next generation results will approximately function as the same proportion in the following generation. Thus, the proportion indicates the percentage that can lead to a fixed allele. So head-crest feathers is closest to the frequency of allele.

Proportion of allele A2 = 1000/100000 = 0.01

Proportion of allele A2 = 1064/100000 = 0.02