Color Blindness Problem Set

Problem 3: Barbara's genotype

Correct!

We have determined that Audrei is homozygous recessive for the red-green color blind allele and that her father is hemizygous with a recessive allele. What is the mother's genotype? Remember that Audrei's mother does not have a color perception defect.

A.	homozygous for the dominant, normal vision allele
B.	heterozygous carrier of the red-green color blind allele In order for Audrei, or any female, to be red-green color blind, she must inherit the recessive allele from each parent. Thus Audrei's mother is a heterozygous carrier.
C.	homozygous recessive for the red-green color blind allele

Pedigree