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Sex Determination

Normal human ...

Question

Normal human females have the sex chromosome composition with ______ Barr bodies

A

XO, 1

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B

XX, 1

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C

XX, 2

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D

XY, O

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Solution

The correct option is B XX, 1
The number of Barr bodies is always one less than the total number of X chromosomes. Hence, a normal human female will have 2 X-chromosomes (XX) with 1 Barr body. Option B is correct answer.

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