heterokaryosis

[het-er-uh-kar-ee-oh-sis]
noun Biology.
condition in which a binucleate or multinucleate cell contains genetically dissimilar nuclei.

Origin:
1915–20; hetero- + karyo- + -sis

heterokaryotic [het-er-uh-kar-ee-ot-ik] , adjective
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Mutations and heterokaryosis are the main causes of variations.
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