In humans, brown eyes are dominant over blue eyes. Suppose a blue-eyed man marries a brown-eyed woman whose?

Question

father was blue-eyed. What porportion of their children would you predict will have blue eyes?

Answer 1

difficult question... ask a scientist

Answer 2

Let B= allele for brown eyes and b=allele for blue eyes. So, B_=brown eyes, and bb=blue eyes.

The woman must be Bb since she had to get a "b" from her father. Since the man is blue eyed, he is bb.

So, half their children will be Bb and half will be bb.