In humans,brown eyes (B)is a simple dominant trait over blue eyes (b).What is the genotype of a brown-eyed woman who has a blue-eyed child?
A)bb.
B)Bb.
C)BB.
D)BBB.
E)BbBb.

Question

Quizplus · Accepted Answer

The brown-eyed woman must be heterozygous (Bb) because she has one dominant allele for brown eyes and one recessive allele for blue eyes. The only way for her to have a blue-eyed child is if she passes down the recessive blue-eyed allele to her child. The child must be homozygous recessive (bb) because they have two copies of the blue-eyed allele.

In Humans,brown Eyes (B)is a Simple Dominant Trait Over Blue