X-Linked Traits and Disorders

X-Linked Traits and Disorders

Author: Nathan Lampson

This lesson will give examples of disorders that are linked to genes on the X chromosome.

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Source: Hemophilia (PBB Protein F8) image, Public Domain: http://bit.ly/RBuSU9; Ishihara image, Public Domain: http://bit.ly/bAziPY; Duchenne-muscular-dystrophy, Public Domain: http://bit.ly/Yx6JRj; Punnett Square made by author

Terms to Know
Duchenne Muscular Dystrophy

An X-linked recessive disorder in which the muscles deteriorate over time.

Faulty Enamel Trait

A disorder caused by a dominant mutant allele on the X chromosome in which enamel that protects teeth does not properly develop.


An X-linked recessive disorder that affects the blood's ability to clot.

Red-Green Color Blindness

An X-linked recessive disorder in which a person cannot distinguish between the colors red and green.

Sex Chromosome

The chromosomes that, when paired, determine the sex/gender of the organism, in humans XX = female while XY = male.