Question

The number of bar bodies in case of 47, XXXX is:

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

The formula is simple and reliable: (Number of X chromosomes) - 1. A normal human female (XX) has 2 - 1 = 1 Barr body.

Answer 1

The Correct Option is C

The quantity of Barr bodies within a somatic cell is determined by: Number of Barr bodies = (Number of X chromosomes) - 1. Given a 47,XXXX karyotype, the individual possesses 4 X chromosomes. Therefore, the calculation is: Number of Barr bodies = 4 - 1 = 3.