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


The Biology Project
University of Arizona
Saturday, October 10, 1998
Contact the Development Team

http://www.biology.arizona.edu
All contents copyright © 1998. All rights reserved.