If somatic cells of a human male contain a single Barr body in its nucleus the most likely genetic constitution of the person will be
Question and options
If somatic cells of a human male contain a single Barr body in its nucleus the most likely genetic constitution of the person will be
- XY
- XXY
- XO
- XYY
Answer and explanation
Correct answer: B - XXY
Number of Barr bodies = number of X chromosomes - 1. A male with one Barr body has two X chromosomes: XXY (Klinefelter syndrome). XY and XYY have no Barr body; XO has none.
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