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Based on the concept of dosage compensation, one of the X chromosomes in a female becomes randomly inactivated and is visible as a Barr body.

1. True
2. False
3. Indeterminable
4. Not applicable

Correct answer: True

Solution

The principle of dosage compensation ensures that females (XX) and males (XY) have equal expression of X-linked genes. In females, one X chromosome is randomly inactivated, forming a Barr body.

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