In summer squash Cucurbita pepo, white fruit is controlled by a
dominant allele, W, and colored fruit by its recessive allele, w.
Only in ww pplants are colored fruits possible. Another
independently assorting gene controls the color. The Y allele
allows production of yellow fruit; the y allele produces green
fruit.

A. A white plant of genotype WWyy is crossed to a true-breeding
yellow plant. What is the penotype of the F1? Explain

B. What ratio of phenotypes is expected in the F2? Show how you
arrived at your answer and explain the gene interaction involved.
Be specific.

C. A cross between a plant with yellow fruit and a plant with
white fruit produced 58 white-fruited, 39 yellow-fruited and 16
green-fruited progeny. What are the genotypes of the parents?