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Lyon hypothesis

Lyon hypothesis n.
The hypothesis that one X-chromosome is inactive during interphase in normal females and is represented in interphase cell nuclei as the sex chromatin body.


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  • Lyonization

    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.

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    /ˈlaɪən/ noun 1. the chief herald of Scotland Also called Lord Lyon

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    [lee-aw-ne] /li ɔˈnɛ/ noun 1. a former province in E France. /French ljɔnɛ/ noun 1. a former province of E central France, on the Rivers Rhône and Saône: occupied by the present-day departments of Rhône and Loire. Chief town: Lyon

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