In the family of a brown-eyed man, whose mother had blue eyes, and a brown-eyed woman

In the family of a brown-eyed man, whose mother had blue eyes, and a brown-eyed woman, a blue-eyed son was born. What is the likelihood that the next child in this family will be blue-eyed?

The brown-eyed man’s mother was blue-eyed, which means his father had brown eyes.

Parents: (father) AA × aa (mother)

Gametes: A a

Offspring: Aa all the children of the marriage are brown-eyed. If a blue-eyed child was born in the family of a brown-eyed man and a brown-eyed woman, then the woman is heterozygous for this trait and has the same genotype as that of a man.

Parents (brown-eyed man) Aa × Aa (brown-eyed woman)

Gametes: A a A a

Prospective offspring: AA brown eye color, Aa brown eye color, Aa brown eye color, aa blue eye color (1: 2: 1). The probability of the next child with blue eyes in this family is 25%.