Question

AaBb individual produces 2 million gametes. How many of them would carry both the recessive alleles (ab)

• A. 1.5 million
• B. 1.0 million
• C. 0.5 million
• D. 0.25 million

Answer 1

The correct option is C 0.5 million

When the organism with genotype AaBb is selfed four types of gamtes are formed. They are AB, Ab, aB, ab. So, in the 2 million gametes, 0.5 million are AB, 0.5 million are Ab, 0.5 million aB, 0.5 million ab.

So, the correct option is ‘0.5 million’.