iGenetics 3rd Edition by Peter Russell

Exercise 1

In the European land snail Cepaea nemoralis , multiple alleles at a single locus determine shell color. The allele for brown (C B ) is dominant to the allele for pink (C P ) and to the allele for yellow (C Y ). The dominance hierarchy among these alleles is C B C P C Y. In one population sample of Cepaea , the following color phenotypes were recorded:
Assuming that this population is in Hardy-Weinberg equilibrium (large, randomly mating, and free from evolutionary processes), calculate the frequencies of the C B , C P , and C Y alleles.