Question

From a cross AaBB x aaBB, which of the following genotypic ratio will be obtained in F${}_1$ generation?

• A. 1 AaBB : 1 aaBB
• B. 1 AaBB : 3 aaBB
• C. 3 AaBB : 1 aaBB
• D. All AaBB : No aaBB

Answer 1

The correct option is A 1 AaBB : 1 aaBB

The gametes obtained from AaBB genotype will be AB and aB. Similarly, the gamete obtained from aaBB genotype will be aB. When cross is made between these two parents, two types of progeny will be obtained, AaBB and aaBB in the ratio of 1:1.

Thus, the correct answer is option A.