Svetlana always wanted to have long eyelashes, like dad and mom. But her eyelashes are short, like both grandmothers (recessive trait (a)). Determine the genotypes of family members for the indicated trait.
Because Svetlana has short eyelashes – a recessive trait, which means the genotype is aa, and the mother and father have long eyelashes (grandmothers have short eyelashes on both lines – aa) – this means the parents are heterozygous (Aa) by the trait.
Answer: Mother – Aa; father – Aa; daughter (Svetlana) – aa
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