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

XXY

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

XXX

No worries! We‘ve got your back. Try BYJU‘S free classes today!

XXXY

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A XXY
Human females contain two X chromosomes as compared to one X chromosome in males. This gives the potential to produce twice the gene product as compared to males.
A mechanism operates here to solve the problem called dosage compensation.
In humans, dosage compensation is achieved by the inactivation of one X chromosome in the female somatic cells. This inactivated chromosome is known as the Barr body.
The number of Barr bodies is one less than the number of X-chromosomes. So, if the somatic cells of a human male contain a single Barr body, the genetic composition of the person would be XXY.

Suggest Corrections

Similar questions

(1 \times 10^{- 3} m l)

5.4 \times 10^{6} R B C, 7.5 \times 10^{3} W B C

3.5 \times 10^{5}

Join BYJU'S Learning Program