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Klinefelter's syndrome in humans corresponds to which karyotype?
A45, X
B47, XXY
C47, XYY
D47, XXX
Answer & Solution
Correct answer: B. 47, XXY
Klinefelter's syndrome arises from an additional X chromosome in a male, giving 47, XXY. Affected individuals show overall masculine traits with some feminine features such as gynaecomastia and are sterile.
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