A blue-eyed man, whose both brown-eyed parents had sexual intercourse with a brown-eyed girl, whose father is brown-eyed

A blue-eyed man, whose both brown-eyed parents had sexual intercourse with a brown-eyed girl, whose father is brown-eyed and her mother is blue-eyed. A man with a woman had a blue-eyed son, determine the genotype of all faces.

1) Brown eye color is dominant.

A – brown eyes,

a – blue eyes.

2) Male genotype – aa. However, his parents were brown-eyed. From each of them, he inherited a recessive allele, respectively, their genotypes – Aa and Aa.

3) The girl is brown-eyed, but her mother has blue eyes (aa). Accordingly, she received allele a from her and is heterozygous – Aa. Her father can have both the AA and Aa genotypes, because the conditions of the problem do not allow us to establish this.

4) The son of this couple has the aa genotype.