NEET Biology question

Barr body in mammals represents

(A)All the heterochromatin in female cells
(B)One of the two X-chromosomes in somatic cells of femalesCorrect
(C)All the heterochromatin in male and female cells
(D)The Y-chromosome in somatic cells of male

Answer: (B)

Solution

When more than one X-chromosome is present (as in normal females), all but one are inactivated and condense into a densely staining mass known as the Barr body, representing one specific inactivated

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Question ID VK-119696