lyonization

Medical Dictionary

Lyonization Ly·on·i·za·tion (lī'ə-nĭ-zā'shən)
n.
The phenomenon in which heterozygous females do not phenotypically express their X-linked recessive genotype or do so only randomly. Also called X-inactivation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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