Klinefelter's syndrome has a chromosomal constitution of .....

An abnormal human baby with $XXX$ sex chromosomes was born due to

The affected individuals are short-statured in disorders like:

In Klinefelter syndrome . . . . . . .

The person with Klinefelter's syndrome has which of the following chromosomal constitutions?

An abnormal male child is born to normal parents. This child shows a short neck,stubby hands,slanting eyes,a permanently open mouth with a projecting upper lip,and short stature. This abnormality can be attributed to: