Which one of the following crosses shows phenotypic ratio of 3:1?

Options

A. AaBb`xx`AaBb
B. aabb`xx`AABb
C. Aabb`xx`Aabb
D. AaBb`xx`aabb

Answer

C

Explanation

To get 3:1 ratio i.e., 3+1=4 zygotes either both parents should produce 2 gametes each or one parent should produce 4 and other one gamete.