Color Blindness Problem Set

Problem 3: Barbara's genotype

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.

If Barbara, the mother, were homozygous for the dominant, normal vision allele, she would have normal vision and her daughter Audrei would be "carrier", but would have normal vision.