Pseudohypertrophic muscular dystrophy is a human disorder that causes gradual deterioration of the muscles. Only boys are affected, and they are always born to phenotypically normal parents. Due to the severity of the disease, the boys die in their teens. Is this disorder likely to be caused by a dominant or recessive allele? Is the inheritance of this trait sex-linked or autosomal?
A) dominant, sex-linked
B) recessive, autosomal
C) recessive, sex-linked
D) incomplete dominant, sex-linked

Question

Quizplus · Accepted Answer

The disorder is likely caused by a recessive, sex-linked allele because it affects only boys, suggesting it is linked to the X chromosome, and the parents are phenotypically normal, indicating a recessive trait.

Pseudohypertrophic Muscular Dystrophy Is a Human Disorder That Causes Gradual