Chapter 4, Problem 37P

Epistatic gene interaction results in a modification of the ${\text{F}}_{\text{2}}$ dihybrid ratio.

a. What is the expected ${\text{F}}_{\text{2}}$ ratio?

b. What genetic principle is the basis of this expected ${\text{F}}_{\text{2}}$ ratio?

c. Give two examples of modified ${\text{F}}_{\text{2}}$ ratios produced by epistatic gene interactions and describe how gene interaction results in the ratios.