Question

If two parents AA and aa the probability of having aa genotype in f1 generation is

Answer 1

Answer: Their is 0 probability of having aa genotype in f1 generation.

Explanation:

If one of the parents is homozygous AA, then it can form only one type of gamete, having a dominant allele A 

And other parent is also homozygous aa, so it can also form only one type of gamete a.
Fusion of these gametes will form only one type of individual Aa.

Hence, probability of having aa genotype is 0.

Answer 2

Answer:

Probability of having "aa" genotype is 0.

Explanation:

• One of the parents is homozygous(having two identical alleles of a particular gene or genes) AA, then it can form only one type of gamete, having a dominant allele A.
• Other parent is also homozygous aa, so it can also form only one type of gamete a. Fusion of these gametes will form only one type of individual Aa.
• So probability of having aa genotype is 0.