What is fragile X syndrome?
A) It is a chromosome defect affecting only females.
B) It is a chromosome defect that follows the pattern of X-linked recessive disorders.
C) It is the second most common genetic cause of cognitive impairment.
D) It is the most common cause of non inherited cognitive impairment.

Question

Quizplus · Accepted Answer

Fragile X syndrome is the most common inherited cause of cognitive impairment,and the second most common cause of cognitive impairment after Down syndrome.This syndrome primarily affects males,follows the pattern of X-linked dominant with reduced penetrance,and is inherited.

What Is Fragile X Syndrome