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polysomy

Pronunciation: pol'e-so'me

Definition: State of a cell nucleus in which a specific chromosome is represented more than twice. Cells containing three, four, or five homologous chromosomes are referred to, respectively, as trisomic, tetrasomic, or pentasomic.

[poly- + G. soma, body (chromosome)]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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