NEET Biology question

Mental retardation in man, associated with sex chromosomal abnormality, is usually due to

(A)Moderate increase in Y complement
(B)Large increase in Y complement
(C)Reduction in X complement
(D)Increase in X complementCorrect

Answer: (D)

Solution

An increase in the number of X chromosomes beyond the normal complement (e.g., 47,XXY in Klinefelter's syndrome) is commonly associated with some degree of mental/intellectual impairment in affected males. A reduction in X complement (c, as in Turner's syndrome, 45,X) is

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-120264