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.
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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.
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Updated: July 15, 1999
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