📖 what
What is X-chromosome inactivation?
GeneticsChromosomes
Quick Answer
X-chromosome inactivation is a process that silences one X chromosome in many female cells. It helps balance gene dosage between XX and XY individuals.
The Full Story
X-chromosome inactivation is a dosage-compensation mechanism in mammals with more than one X chromosome. Early in embryonic development, one X chromosome in each cell is mostly switched off, and this choice is usually maintained as cells divide. The inactive X condenses into a structure called a Barr body. This process helps prevent females from making roughly double the amount of X-linked gene products.
Key Facts
1.It occurs in mammals with two X chromosomes
2.The inactive X condenses into a Barr body
3.It helps balance X-linked gene dosage
YouTube Angle
Suggested video title for this topic:
"Why one X chromosome gets switched off"