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_____________________ determines which X chromosome remains active.

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_____________________ determines which X chromosome remains active.

(a) XIST

(b) XCE

(c) XIC

(d) RB

This question was posed to me in an internship interview.

My question is based upon Dosage Compensation Mechanism for X linked Genes in chapter Chromosomes and Sex Determination of Cytogenetics

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The correct option is (b) XCE

To explain I would say: XCE or X controlling element that is present in the XIC region determines which X chromosome will be inactivated.

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