A male has a thin,frail-looking area on his X chromosome of the 23rd pair.As children,people with this syndrome are typically mildly developmentally delayed but shift to severe or profound developmental delay as adults.This is condition is known as:
A)fragile X syndrome.
B)Down syndrome.
C)fetal alcohol syndrome.
D)trisomy 18.

Question

Quizplus · Accepted Answer

The description matches that of fragile X syndrome, which is caused by a fragile, thin area on the X chromosome. Individuals with this syndrome may have mild developmental delay as children but experience more severe developmental delay as adults.

A Male Has a Thin,frail-Looking Area on His X Chromosome