If somatic cells of a human male contain single Barr body, the genetic composition of the person would be

XYY

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XXY

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XXXY

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Solution

The correct option is B XXY
The number of Barr body is always one less than the total number of X chromosomes. Hence, If somatic cells of a human male contain single Barr body, it will have two X-chromosomes and his genetic composition would be XXY.

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