Definitions for "Lyonization"
When genes on one of the x-chromosomes of the female is randomly inactivated early in the developmental process.
(synonym: X-chromosome inactivation) The phenomenon in females by which one X chromosome (either maternally derived or paternally derived) is randomly inactivated in early embryonic cells, with fixed inactivation in all descendant cells; first described by the geneticist Mary Lyon Related Terms: X-chromosome inactivation study ; X-linked dominant ; X-linked recessive ; mosaicism ; replication analysis