The phenotypic ratio resulting from a dihybrid cross of two heterozygote individuals showing independent assortment is expected to be
A) 1:2:1
B) 3:1
C) 9:1:1:3
D) 9:3:3:1

Question

Quizplus · Accepted Answer

A dihybrid cross involves the inheritance of two different traits. When these two traits segregate independently, the expected phenotypic ratio is 9:3:3:1, meaning that 9/16 of the offspring will exhibit both dominant traits, 3/16 will exhibit one dominant and one recessive trait, 3/16 will exhibit the other dominant and recessive trait combination, and 1/16 will exhibit both recessive traits. Therefore, D is the best choice.

The Phenotypic Ratio Resulting from a Dihybrid Cross of Two