In the marriage of right-handed parents (dominant feature (A)), a left-handed son was born. Determine the genotypes

In the marriage of right-handed parents (dominant feature (A)), a left-handed son was born. Determine the genotypes of family members for the indicated trait.

Because in a left-handed son, it is recessive, which means the aa genotype, and in a mother and father, right-handedness means the parents are heterozygous (Aa) by trait.

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