Question

If individuals of genotype Aa Bb Cc are intercrossed, how many different genotypes can occur in their progeny?

• A. 6
• B. 9
• C. 15
• D. 27

Answer 1

The correct option is D 27

Aa x Aa can produce three genotypes: AA, Aa and aa (Aa and aA are equivalent). The same with Bb x Bb and Cc x Cc. Since we presume they are independent, you have 3 x 3 x 3 = 27 combinations (AABBCC, AABBCc, AABBcc, AABbCC, AABbCc, AABbcc … aabbcc).

So, the correct answer is '27'.