Biology: Concepts and Investigations 2nd Edition by Mariëlle Hoefnagels

Exercise 40

Wild-type canaries are yellow. A dominant mutant allele of the color gene, designated W, causes white feathers. Inheriting two dominant alleles is lethal to the embryo. If a yellow canary is crossed to a white canary, what is the probability that an offspring will be yellow? What is the probability that it will be white?