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  • What is a Barr Body?Option: 1  A condensed, inactive X chromosome in femalesOption: 2</s

What is a Barr Body?

Option: 1

 A condensed, inactive X chromosome in females


Option: 2

An extra copy of an X chromosome


Option: 3

A regulatory protein involved in dosage compensation


Option: 4

A structure found in males that compensates for the lack of a second X chromosome


Answers (1)

best_answer

A Barr body is a condensed, inactive X chromosome that is found in female cells. During early embryonic development in females, one of the two X chromosomes is randomly inactivated to equalize the expression of genes between males (who have one X chromosome) and females (who have two X chromosomes). The inactivated X chromosome is then compacted and forms a distinctive structure known as a Barr body. The formation of Barr bodies allows females to maintain gene dosage compensation between males and females, despite having two copies of the X chromosome. Barr bodies are not found in male cells, as males only have one X chromosome.

Option 1 is the correct answer. 

Posted by

Suraj Bhandari

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