Question

Monohybrid crosses: A brown-eyed man marries a blue-eyed woman. They have 8 children, all of whom are brown-eyed. What is the genotype of the man?

A) BB
B) Bb
C) bb
D) Cannot be determined

Answer 1

The genotype of the brown-eyed man cannot be determined without more information, even though all his children with the blue-eyed woman have brown eyes.

Step-by-step explanation:

In the scenario of monohybrid crosses where a brown-eyed man marries a blue-eyed woman and all their children are brown-eyed, we can infer the genotype of the man. Since brown eyes are dominant over blue eyes and all eight children have brown eyes, we can determine that the man must have at least one dominant allele for brown eyes. However, we cannot conclusively say whether he is homozygous dominant (BB) or heterozygous (Bb) without information about the woman's genotype or the man's parents. Therefore, the correct answer to the question, 'What is the genotype of the man?' is D) Cannot be determined with the given information.