The leading cause of inherited IDD is
A) Down syndrome.
B) Fragile X.
C) Turner's syndrome.
D) PKU.

Question

Quizplus · Accepted Answer

Fragile X is the leading cause of inherited intellectual and developmental disabilities (IDD), affecting about 1 in 4,000 males and 1 in 8,000 females. Down syndrome is a common cause of IDD, but it is not inherited. Turner's syndrome and PKU can also cause IDD, but they are much less common than Fragile X.

The Leading Cause of Inherited IDD Is