This is a linked charactersitic. Whip-poor-wills. ( Camprimulgus vociferus ! The

Question

This is a linked charactersitic. Whip-poor-wills. (Camprimulgus vociferus! The population has found in two adult phenotypes: rufous(red) and gray. An ornithologist investigates the genetics of this color variation and discovers that rufous individuals are one of two genotypes (RR or Rr), while gray individuals are rr. The frequency of these genotypes at Generation 1 in northern New Jersey are: 60% RR, 20%Rr, and 20% rr.

What will the dominant allele frequency be in the generation after Generationt+2 ?

Explanation / Answer

Given that, the percent of people with RR genotype, p2 = 60% or 0.6

Frequency of Rr allele, 2pq = 0.2; and p+q = 1 (Assuming the population is in Hardy-Weinberg equilibrium)

The frequency of R allele, or p = 2* 0.6 + 0.20/ 2* (1) = 0.7

The percent of people with rr genotype, q2 = 20% or 0.2

The frequency of r allele or q = 2* 0.2 + 0.2/ 2* (1) = 0.3

Dominant llele frequencie after t generations, pt = p0/ 1+ 2p0

Where, p0 = allele frequency at parental generation. pt = Allele frequency after two generations

= => Allele frequency after two generations, p2 = 0.7/ 1+2*0.7 = 0.7/ 2.4 = 0.29

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