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  • Which of the following statements about Barr bodies is true?Option: 1 Barr bodies are present in both male and female cells

Which of the following statements about Barr bodies is true?

Option: 1

Barr bodies are present in both male and female cells


Option: 2

Barr bodies are essential for normal cell function


Option: 3

Barr bodies can be observed in live cells using a microscope


Option: 4

Barr bodies are formed by the inactivation of the Y chromosome


Answers (1)

best_answer

The correct answer is a) Barr bodies are present in both male and female cells. Barr bodies are only observed in female cells and represent the inactivated X chromosome. In male cells, which have a single X chromosome, a Barr body is not formed. 

The Barr body is a compacted and inactivated X chromosome that appears as a dense spot in the nucleus of female cells. It is formed during early embryonic development as a result of random X chromosome inactivation, which is a process that equalizes gene expression between males and females. The inactivated X chromosome is then packaged into a Barr body, which is silenced and largely transcriptionally inactive. Barr bodies are not essential for normal cell function and are not visible in live cells using a microscope.

Option 1 is the correct answer. 

Posted by

manish painkra

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