NEET Biology question

In which of the following diseases does the man have an extra X-chromosome?

(A)Turner's syndrome
(B)Klinefelter's syndromeCorrect
(C)Down's syndrome
(D)Hemophilia

Answer: (B)

Solution

Klinefelter's syndrome (karyotype 47,XXY) is characterized by an extra X-chromosome in an otherwise male (XY) individual. Turner's syndrome (a) involves a missing, not extra, X chromosome (45,X) and occurs in

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Question ID VK-120200