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The number of chromosomes in Klinefelter...

The number of chromosomes in Klinefelter's syndrome is

A

47 (44 + XXY)

B

47 (44 + XXX)

C

47 (46 + 1 chromosome 21)

D

None of these

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The correct Answer is:
A
Klinefelter's syndrone is a human sex abnormality, arise due to non-disjuction of sex chromosemes during meiosis.It is characterised by the chromosome number. `2n = 47`, the chromosomal fromula is `44A+ XXY`,
Klinefelter's syndrome is a male in general appearance tests are underdeveloped, enlarged breat (gyaeco mastia), Mentally defective and abnormally tall. Mental retardation increases with X complement. The karyotypes of extreme Kinefelter's syndrome are 44A+XXXY, 44A+XXXXY, 44A+XXXYY etc. In Turner syndrome, chromosome numberis 2n=45. The chromosomal formula is 44A=XO. She is a steile female. 22A+XY is chromosome constitution of normal female individuals, are homogenetic
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