Sex-Linked Inheritance Problem Set

Problem 10: Offspring of human females who are carriers for X-linked traits

Tutorial to help answer the question

A human female "carrier" who is heterozygous for the recessive, sex-linked trait red color blindness, marries a normal male.

What proportion of their female progeny will show the trait?

Tutorial

Genotypes and phenotypes of parents






The eggs of the mother will contain either a normal X chromosome or an X chromosome with the mutation causing red-green color blindness
(i.e. She is a "carrier".)

The sperm of the father will contain either the normal X chromosome or the Y chromosome.

Genotypes and phenotypes of offspring





The eggs of the mother will contain either a normal X chromosome or an X chromosome with the mutation causing red-green color blindness (i.e. She is a "carrier").

The sperm of the father will contain either the normal X chromosome or the Y chromosome.


The Biology Project
University of Arizona
Updated: July 15, 1999
Contact the Development Team

http://www.biology.arizona.edu
All contents copyright © 1996-99. All rights reserved.