question_answer

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

A) An extra Y chromosome

B) An extra X chromosome

C) An extra chromosome in the 21st pair of autosomes

D) Absence of X chromosome leading to a total of 45 chromosomes instead of the normal 46