The process in which each cell in a girl's body selects at random and turns off one of its two X chromosomes. X inactivation is one reason why some patients with Rett syndrome (RS) have more severe symptoms than others.
X inactivation
| Medical Glossary: X inactivation |
| 5min Related Video: X inactivation |
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 | XIST (genetics) |
| dosage |
| chromosomal |
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