Question

How many Barr bodies (inactivated X chromosomes) are expected in cells of a human individual who...

How many Barr bodies (inactivated X chromosomes) are expected in cells of a human individual who is XXX, 2A.

  • A. 1

  • B. 2

  • C. 3

  • D. None of the above.

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Answer #1

B 2

Explanation- The amount of protein produced by X-linked genes in males and females is equalized by dosage compensation. If a cell contains more than two X chromosomes, all except one X chromosome is inactivated and become barr body. So there will be 2 barr bodies of an individual having 3 X chromosomes.

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