Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

A dihybrid cross describes a mating between two organisms that are identically hybrid for two traits, whereas a cross between two types of plants of the same species with the transmission of one character is called monohybrid cross.

A typical dihybrid cross AaBb x AaBb will produce 16 types of offsprings as follows:

Homozygous genotypes: AABB (1), AAbb(1), aaBB(1), aabb(1)

Monohybrid genotypes: AaBB(2), AABb(2), aaBb(2), Aabb(2)

Dihybrid genotypes: AaBb(4)

Thus, the proportion of monohybrids is 2 + 2 + 2 + 2 = 8 out of 16, which is 50%