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39. X chromosome inactivation is an epigenetic mechanism that silences the majority of genes on one X chromosome. The inactivation appears to involve regions of .
(A) mutated genes
(B) intense transcription
(C) hyper-methylated DNA
(D) hypo-methylated DNA
(E) inverted genes

學士後西醫-普通生物及生化概論- 107 年 - 107 學士後西醫：普通生物及生化概論#76177

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Peipool 高三下 (2021/03/18)

X染色體去活化(X chromosome inactivation)，又稱X染色體失活或里昂化，是指雌性哺乳類細胞中兩條X染色體的其中一條失去活性的現象。

X-chromosome inactivation (XCI) is a dosage compensation mechanism that silences the majority of genes on one X chromosome in each female cell. ... Both intra- and inter-genic CGIs undergo epigenetic modification, with the biggest increase in methylation occurring at the promoters of genes silenced by XCI.

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