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Question
How many inactivated hetero-chromatinised X-chromosomes are present in 44 + XXX female?
How many inactivated hetero-chromatinised X-chromosomes are present in 44 + XXX female?
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Solution
The correct option is C 2
X-inactivation (also called lyonization) is a process by which one of the copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by it being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. In this case the total number of X chromosome is three out of which only one can express itself and the other two will remain inactivated.
So the correct option is '2'.
X-inactivation (also called lyonization) is a process by which one of the copies of the X chromosome present in female mammals is inactivated. The inactive X chromosome is silenced by it being packaged in such a way that it has a transcriptionally inactive structure called heterochromatin. In this case the total number of X chromosome is three out of which only one can express itself and the other two will remain inactivated.
So the correct option is '2'.
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