Question

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

• A. XYY
• B. XXY
• C. XO
• D. XXXY

Answer 1

Answer: (B)

If somatic cells of a human male contain single Barr body, the genetic composition of the person would be $XXY$.
Presence of one Barr body indicates that there will be two $X$-chromosomes in genetic composition of the person.