Which Of The Following Best Describes The Function Of The Xist Gene In X Chromosome Inactivation?

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Which Of The Following Best Describes The Function Of The Xist Gene In X Chromosome Inactivation?

a) The XIST gene codes for an enzyme that methylates DNA on the X chromosome being inactivated. b) The XIST gene on the X chromosome to be inactivated is expressed to produce multiple RNA transcripts that bind to that chromosome and effectively cover it up, thereby generating a Barr body. c) The XIST gene on the X chromosome to remain active is expressed to produce multiple RNA molecules that bind to the X chromosome to be inactivated and effectively cover it up, thereby generating a Barr body. d) Together with other proteins, the product of the XIST gene binds to histones and induces supercoiling of the DNA in one of the X chromosomes, thus inactivating it. e) The first and second listed responses are correct.
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b) The XIST gene on the X chromosome to be inactivated is expressed to produce multiple RNA transcripts that bind to that chromosome and effectively cover it up, thereby generating a Barr body.
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