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Question

Number of Barr Body is XXXX female:

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is C 3
Barr body is a mass of condensed sex chromatin in the nuclei of normal female somatic cells. Its compact appearance is due to its inactivity.
Thus Barr body represents the inactivated X-chromosomes and the number of Barr bodies in a cell is one less than the total number of X-chromosomes in it.
Therefore, for this question, the number of Barr bodies seen is 3.

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