Sergei always wanted to have a nose with a hump, like his dad’s (dominant feature (A)). But his nose is straight, like mom’s

Sergei always wanted to have a nose with a hump, like his dad’s (dominant feature (A)). But his nose is straight, like mom’s. Determine the genotypes of family members for the indicated trait.

Because the son (Sergey) has a straight nose, and the dad has a crooked nose, which means the father is heterozygous (Aa) by trait.
Answer: Mother – aa; father – Aa; son (Sergey) – aa.

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