Principle of Inheritance and VariationHard

Question

Barr-body in mammals represents

Options

A.One of the two X chrosomes in somatic cells of females.
B.All heterochromatin of male & female cells.
C.Y chrosomes of male.
D.All heterochromatin of female cells.

Solution

Barr-body is the inactive one Z-chromosome in somatic cells of female (Dosage compansation). The number of Barr bodies are always one less than the total number of chromosome.

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