Question

if two chickens with the genotypes aarr and aarr are crossed, what are the possible genotypes of their offspring? correct answer(s) aarr aarr aarr aarr aarr incorrect answer(s)

Explanation:

Step1: Determine gametes of parents

The first parent with genotype Aarr can produce gametes Ar and ar. The second parent with genotype AARR can produce only AR gametes.

Step2: Perform cross - fertilization

When we cross - fertilize, we combine the gametes. Combining Ar with AR gives AARr. Combining ar with AR gives AaRr. Combining Ar with AR again gives AARr and combining ar with AR gives AaRr. Also, combining Ar with AR can give AaRR.

Answer:

AaRr, AaRR, AARr