In the marriage of brown-eyed parents (dominant feature (A)), a blue-eyed daughter was born. Determine the genotypes of family members for the indicated trait.
Because the daughter has blue eyes – a recessive trait, which means the aa genotype, and for the mother and father – brown – it means the parents are heterozygous (Aa) by the trait.
Answer: Mother – Aa; father – Aa; daughter – aa.
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