A brown-eyed mother and a blue-eyed father had a brown-eyed daughter. what could be the genotypes

A brown-eyed mother and a blue-eyed father had a brown-eyed daughter. what could be the genotypes of parents and their daughter? in which case it is possible to accurately establish the genotypes of the parents?

Since the daughter has inherited brown eyes, the dominance of this trait should be assumed.

Let’s designate the gene that determines the development of blue eyes as b, then the gene that causes brown eyes will be B.

A mother with blue eyes will be cc, because homozygosity is a prerequisite for the formation of a blue iris. The ova produced by the mother’s body will be of the same type —b.

The genotype of a father with a brown eye color can be either homo- (BB) or heterozygous (Bb). In both cases, he can be the father of a brown-eyed girl (with the Bb genotype).

To reliably establish the heterozygosity of the father, it is necessary to give birth to a blue-eyed child (bb) in this family, who would receive the recessive, hidden gene of such a parent.