Duchenne muscular dystrophy is caused by a mutation of a gene on the ___ chromosome.
A) X
B) Y
C) 21st
D) 1st
E) 18th

Question

Quizplus · Accepted Answer

Duchenne muscular dystrophy is an X-linked recessive disorder, meaning it is caused by a mutation in a gene on the X chromosome. Females have two X chromosomes, so they can inherit a normal copy of the gene on one X chromosome and still not have symptoms, while males only have one X chromosome and will develop symptoms if they inherit the mutated gene.

Duchenne Muscular Dystrophy Is Caused by a Mutation of a Gene