Question

A person with 47 chromosomes due to an additional Y-chromosome suffers from a condition called

(a) Down's syndrome 

(b) Super female 

(c) Turner's syndrome 

(d) Klinefelter's syndrome

Answer 1

Correct option (d) Klinefelter's syndrome

Explanation

HF Klinefelter first described this condition in 1942. The chromosome number is 2n = 47 with the formula 44A + XXY.

Phenotypically these individuals are males, but they can show some female secondary sexual characteristics and are usually sterile.