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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
True abut 'X' Chromosome inactivation:
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The correct answer is  A i.e. X-gene Although females have 2X chromosomes (XX), but due to inactivation (lyonization) genes on one X chromosome becomes transcriptionally inactive. Thus X inactivation prevents expression of most genes on one of the X- chromosome in every cell of femaleQ.