Assertion -A- Klinefelter nbsp-syndrome occurs only in males-Reason -R- Klinefelter nbsp-syndrome is characterised by an additional Y chromosome in the karyotype-

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Standard XII

Biology

X-Linked Inheritance in Humans

Assertion [A]...

Question

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

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

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Solution

Klinefelter's syndrome is caused due to the presence of an additional X chromosome in the karyotype of males.

This results in 44 autosomes + XXY allosomes (totally, 47 chromosomes).

Such men are sexually sterile because their reproductive organs are not well developed.

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

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

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Assertion

Klinefelters syndrome shows gynaecomastia

Reason

An additional Y chromosome is present in the karyotype

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.

Q. Klinefelters syndrome is characterised by a karyotype of

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Assertion [A]: Klinefelter syndrome occurs only in males. Reason [R]: Klinefelter syndrome is characterised by an additional Y chromosome in the karyotype.

Klinefelter's syndrome is caused due to the presence of an additional X chromosome in the karyotype of males. This results in 44 autosomes + XXY allosomes (totally, 47 chromosomes). Such men are sexually sterile because their reproductive organs are not well developed.

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

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

Klinefelter's syndrome is caused due to the presence of an additional X chromosome in the karyotype of males.

This results in 44 autosomes + XXY allosomes (totally, 47 chromosomes).

Such men are sexually sterile because their reproductive organs are not well developed.