Which of the following statements is true? a)  only males can get an X-linked. disorder.
b) only females can get an X-linked disorder.
c) only males can get a Y-linked disorder.

The answer is a

Explanation:

X-linked disorders result from mutated genes on the X chromosome. Males, who have only one X chromosome (i.e., they are hemizygous), will fully express an X-linked disorder. On the other hand, females, who have two X chromosomes, will be carriers of the defect in the majority of cases, and so they are usually asymptomatic.