Peppered moths are dark-colored when they carry the dark (D) allele, and light-colored when they are homozygous for the recessive (d) allele. A geneticist collected a population of 50 peppered moths, and found that 18 were dark (DD or Dd) and 32 were light (dd).

A drawing of the light form (dd) and the dark form (Dd or Dd) of the peppered moth is shown.

What are the allele frequencies for the alleles in this population? Assume that the conditions of Hardy-Weinberg equilibrium apply.

A. D = 0.20; d = 0.80
B. D = 0.50; d = 0.50
C. D = 0.25; d = 0.75
D. D = 0.36; d = 0.64