The following syndrome is now recognized as a leading cause of inherited intellectual and developmental disabilities:
A) Tay-Sachs disease.
B) Down syndrome.
C) Turner's syndrome.
D) Fragile X syndrome.

Question

Quizplus · Accepted Answer

Fragile X syndrome results from a mutation on the X chromosome and is the most common genetic cause of inherited intellectual and developmental disabilities. It affects both males and females, but males are typically more severely affected. Symptoms can include intellectual disabilities, behavioral problems, and physical characteristics such as a long and narrow face, large ears, and a prominent forehead.

The Following Syndrome Is Now Recognized as a Leading Cause