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 number of Barr bodies in a somatic cell is calculated using the formula: Number of Barr bodies = (Number of X chromosomes) - 1. In this case, the individual has a 47,XXXX karyotype, meaning there are 4 X chromosomes. Number of Barr bodies = 4 - 1 = 3.