The most common type of genetically inherited intellectual developmental disorder is ______.
A) Klinefelter's syndrome
B) Turner's syndrome
C) fragile X syndrome
D) Korsakoff's syndrome

Question

Quizplus · Accepted Answer

Fragile X syndrome is the most common genetic cause of intellectual developmental disorder, affecting around 1 in 4,000 males and 1 in 8,000 females. It occurs due to a mutation in the FMR1 gene on the X chromosome. Klinefelter's syndrome and Turner's syndrome are chromosome abnormalities that can lead to developmental delays, but they are not inherited in the traditional sense. Korsakoff's syndrome is a neurological disorder caused by alcohol misuse and is not a genetically inherited disorder.

The Most Common Type of Genetically Inherited Intellectual Developmental Disorder