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1. in prokaryotes, the circular DNA molecule containing the entire set of genetic instructions essential for life of the cell. See genophore. 2. in the eukaryotic nucleus, one of the threadlike structures consisting of chromatin (q.v.) and carrying genetic information arranged in a linear sequence. See Chronology, 1883, Roux; 1888, Waldeyer.

Subjects: Biological Sciences.

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