In a dihybrid cross of two heterozygous individuals, you expect a 9:3:3:1 phenotypic ratio in the offspring, but observe a ratio of 9:7. What is the most likely explantation?
A) Codominace
B) It is a sex-limited trait
C) Simple Mendelian inheritance
D) Incomplete penetrance
E) Epistatic interactions of the two genes

Question

Quizplus · Accepted Answer

The 9:7 ratio suggests epistatic interactions, where one gene's expression masks or modifies the effect of another gene, altering the expected Mendelian ratio.

In a Dihybrid Cross of Two Heterozygous Individuals, You Expect