Question Detail
Question
A heterozygous, brown-eyed woman and blue-eyed man have a child, if the allele for brown eyes is dominant to the allele for blue, what are the chances that the child is blue-eyed? A. 1 in 2 B. 3 in 4 C. 1 in 4 D. None
Correct Answer
Option A is the correct answer.
Detailed Explanation
Woman is heterozygous (Bb). Man is blue-eyed, so homozygous recessive (bb). Cross Bb x bb gives 1/2 Bb (brown) and 1/2 bb (blue). So chance of blue-eyed child is 1 in 2.
Hint
It's a test cross.