Question

Which of the following is associated with Barr body?

• A. Autosome
• B. X chromosome
• C. Y chromosome
• D. Only male body

Hint:

Barr bodies are only present in females and represent inactivated X chromosomes that help equalize gene expression between the sexes.

Answer 1

The Correct Option is B

Step 1: Understand Barr body formation. 
A Barr body is an inactivated X chromosome in female mammals, which occurs to balance the gene dosage between males and females. 
Step 2: Analyze the options. 
The Barr body is associated with the X chromosome and is found in females to prevent double expression of X-linked genes. Autosomes are non-sex chromosomes and are not involved in Barr body formation. The Y chromosome does not form a Barr body. Males do not have Barr bodies because they have only one X chromosome. 
Conclusion: The correct answer is (B) X chromosome.