The number of chromosomes in Klinefelter's syndrome is

47 (44 + XXY)

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47 (44 + XXX)

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47 (46 + 1 chromosome 21)

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None of the above

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Solution

The correct option is D 47 (44 + XXY)
The person with Klinefelter's syndrome will be phenotypically male with secondary sexual characteristics of female. This is due to the presence of an extra X chromosome. Altogether there are 47 chromosomes. That is XXY.

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Similar questions

	List I - Syndrome		List II - Chromosomal abnormalities
A	Klinefelter syndrome	p	Trisomy 13
B	Turner's syndrome	q	Trisomy 18
C	Super female	r	44+XXY
D	Patau's syndrome	s	44+XXX
		t	44+XO

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