Question

$F_1$ offspring of the monohybrid cross AA $\times$ aa are _______.

• A. All AA
• B. All Aa
• C. All aa
• D. 1/2 AA and 1/2 aa

Answer 1

The correct option is B All Aa

If a cross is made between AA and aa, all the offsprings will be Aa. The F${}_1$ generation shows the dominant phenotype. Aa is heterozygous and it has one copy of two different alleles.

So, the correct answer is 'All Aa'.