Genetics: Analysis and Principles 5th Edition by Robert Brooker

Exercise 21

In certain species of summer squash, fruit color is determined by two interacting genes. A dominant allele, W , determines white color, and a recessive allele ( w ) allows the fruit to be colored. In a homozygous ww individual, a second gene determines fruit color: G (green) is dominant to g (yellow). A white squash and a yellow squash were crossed, and the F 1 generation yielded approximately 50% white fruit and 50% green fruit. What are the genotypes of the parents