Multiple choice

Assertion (A): In Klinefelter’s syndrome, the chromosomal constitution of man is 22AA + XXY. Reasoning (R): Few men have XX karyotype and yet are males. This is a rare phenomenon due to translocation of a small segment of Y chromosome attached to an X chromosome and is inherited in concert with X. Choose the correct option for the above statements.

  1. Both Assertion and Reasoning are true and R is the correct explanation of A.

  2. Both Assertion and Reasoning are true and R is not the correct explanation of A.

  3. A is true and R is false.

  4. Both A and R are false.

  5. A is false and R is true.
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A Correct answer
Explanation

In Klinefelter’s syndrome, the chromosomal constitution of man is 22AA + XXY.Few men have XX karyotype and yet are males. This is a rare phenomenon due to translocation of a small segment of Y chromosome attached to an X chromosome and is inherited in concert with X. In Klinefelter’s syndrome, the chromosomal constitution of man is 22AA + XXY.Few men have XX karyotype and yet are males. This is a rare phenomenon due to translocation of a small segment of Y chromosome attached to an X chromosome and is inherited in concert with X.

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