Coloration in the Peppered Moth (Biston Betularia)is Determined by a Single

Coloration in the peppered moth (Biston betularia) is determined by a single gene with two alleles showing complete dominance.Dark moths are homozygous dominant or heterozygous for the gene,light moths are homozygous recessive.In a sample of 100 moths,you determine that 64 of the moths are dark.According to the Hardy-Weinberg rule,the expected frequency of the dominant allele is ____.

A) 0.4
B) 0.36
C) 0.6
D) 0.64
E) cannot be determined