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

Multiple Choice

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 known as _______.

A) fragile X syndrome
B) Down syndrome
C) fetal alcohol syndrome
D) familial retardation