Question

Number of gametes produced by a homozygous and a heterozygous individuals o f genotype $AA$ and $Aa$, respectively are

• A. 1 and 2
• B. 2 and 3
• C. 3 and 5
• D. many

Answer 1

Answer: (A)

The formula to calculate the number of gametes from a given genotype is $2^n$.
Where, $n=$ number of heterozygosity in the given genotype.
Thus, number/types of gametes produced by a homozygous individual of genotype $AA$ is $2^{(0)}=1$
and by heterozygous individual of genotype Aa is $2^{(1)}=2$.