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30 June, 08:22

What is a Barr body, and where is it found in a cell? b) Define the Lyon hypothesis.

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  1. 30 June, 11:05
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    Barr body may be defined as the one of the inactive X chromsome of the human female. The human female consists of XX chromosome whereas XY in male. To compensate the extra X chromosome in female one of the X chromosome become inactive and known as barr body. The barr body is found in the somatic cells.

    Lyon hypothesis:

    Lyon hypothesis states that dosage compensation occur in human females by the random inactivation of one of the X chromosome. The inactivated X chromosome is named as barr body. The lyon hypothesis was given by Mary Lyon.
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