What would be the number of chromosomes in the ovum (fertilized by a normal sperm) that resulted in the appearance of Klinefelter's syndrome in the offspring?

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Solution

The correct option is D 24
Men with Klinefelter’s syndrome have an extra X chromosome. The normal male chromosome arrangement is 46 XY, but for men with Klinefelter’s syndrome it is 47XXY. The extra X chromosome may come from the egg or sperm, or be ‘added’ early in the development of the embryo. It is not known why the extra X chromosome happens. The extra X chromosome also affects the ability to produce sperm. Men with this condition are infertile as they almost always have no sperm in their ejaculate.

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Similar questions

Choose the correct option:

Assertion [A]: Patients having Klinefelter syndrome have higher amounts of estrogen in the body.
Reason [R]: Klinefelter syndrome occurs due to appearance of an extra X chromosome in the human males.

Choose the correct option regarding the Assertion and Reason:

Assertion [A]: Patients having Klinefelter syndrome have higher amounts of estrogen in the body.
Reason [R]: Klinefelter syndrome occurs due to appearance of an extra X chromosome in the human males.

Assertion [A]: Klinefelter syndrome occurs only in males.

Reason [R]: Klinefelter syndrome is characterised by an additional Y chromosome in the karyotype.

Q. The number of chromosomes in normal humans is

46

. After meiosis in sperm production, the number of chromosomes and the number of resulting cells would be

Q. Due to non-disjunction of chromosomes during spermatogenesis, sperms carry both sex chromosomes (22A+XY) and some sperms do not carry any sex chromosome (22A+0). If these sperms fertilize normal eggs (22A+X), what types of genetic disorders appear among the offsprings?

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