Which of the Following Represents a Dihybrid Cross

Question

Which of the following represents a dihybrid cross?
A) ff x ff
B) Gg x gg
C) AAbb x Aabb
D) AAbb x aaBB
E) Ss x ss

Accepted Answer

A dihybrid cross involves two different traits that are each heterozygous in the parental individuals. In this case, the AAbb individual is homozygous for trait A and homozygous recessive for trait B, while the aaBB individual is homozygous recessive for trait A and homozygous dominant for trait B. This will result in F1 offspring that are all heterozygous for both traits (AaBb).