A woman with normal vision (recessive trait (a)) marries a short-sighted man. The family had a daughter with normal vision.

A woman with normal vision (recessive trait (a)) marries a short-sighted man. The family had a daughter with normal vision. Determine the genotypes of family members for the indicated trait.

Because the daughter’s normal vision is a recessive trait, which means the genotype is aa, the mother has normal vision – aa, and the father’s is myopia, which means the father is heterozygous (Aa) by the trait.
Answer: Mother – aa, father – Aa, daughter – aa

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