Dictionary of Human Evolution and Biology

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Literally, the good count; condition of having a normal or full complement of chromosomes or chromatids, i.e. the chromosome number of a cell is an exact multiple of the haploid number normal for the species from which it originated. Adjective: euploid. Usually refers to the modal haploid or diploid number that is characteristic for a given species (N or 2N), but may also refer to other whole multiples as well (3N, 4N,... etc.; see polyploidy).

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