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any of the rod-shaped or threadlike DNA-containing structures of cellular organisms that are located in the nucleus of eukaryotes, are usually ring-shaped in prokaryotes (such as bacteria), and contain all or most of the genes of the organism
visual representation of the complete set of chromosomes in a cell. In a karyotype, the chromosomes, isolated from a cell, are organized numerically, facilitating the identification of deviations in chromosome number or structure.