Which of the Following Events Results in X-Inactivation in Female

question 5

Multiple Choice

Which of the following events results in X-inactivation in female mammals?

• A) activation of the XIST gene on the X chromosome that will become the Barr body
• B) activation of the BARR gene on one X chromosome, which then becomes inactive
• C) inactivation of the XIST gene on the X chromosome derived from the male parent
• D) attachment of methyl (-CH3) groups to the X chromosome that will remain active

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