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X inactivation is an example of epigenetic phenomenon.

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X inactivation is an example of epigenetic phenomenon.

(a) True

(b) False

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I need to ask this question from Dosage Compensation Mechanism for X linked Genes topic in chapter Chromosomes and Sex Determination of Cytogenetics

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The correct choice is (a) True

The explanation is: During x inactivation the X chromosome is converted to heterochromatin by histone remodeling. This is a heritable character that is not present in the DNA sequence but histone code. Thus it is an epigenetic phenomenon.

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