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Karyorrhexis

Noun 1. The destructive fragmentation of the nucleus of a dying cell whereby its chromatin is distributed irregularly throughout the cytoplasm. It is usually preceded by pyknosis and is followed by karyolysis and can occur as a result of either programmed cell death or necrosis. (wikipedia.org) 2. Fragmentation of the nucleus whereby its chromatin is distributed irregularly throughout the cytoplasm; a stage of necrosis usually followed by karyolysis. (medilexicon.com) 3. Degeneration of the nucleus of a cell. There is contraction of the chromatin into small pieces, with obliteration of the nuclear boundary. (biology-online.org) Word origin: From Greek karyon “nut, kernel” + rhexis,...

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Karyotype

/ˈkarēəˌtīp/ Noun, pl. karyotypes 1. The number and appearance of chromosomes in the nucleus of a eukaryotic cell. The term is also used for the complete set of chromosomes in a species, or an individual organism. (wikipedia.org) 2. The observed characteristics (number, type, shape etc) of the chromosomes of an individual or species. (wiktionary.org) 3. A record of such characteristics, usually photographic. (wiktionary.org) 4. The chromosome characteristics of an individual cell or of a cell line arranged in descending order of size and according to the position of the centromere. Usually presented as a systematized array of metaphase chromosomes from a photomicrograph of a single cell nucleus. (medilexicon.com) 5. The appearance of the chromosomal makeup of a somatic cell in an individual or species (including the number and arrangement and size and structure of the chromosomes). (wordnetweb.princeton.edu) 6. The number and visual appearance of the chromosomes in the cell nuclei of an organism or species. (Google Dictionary) Word origin: From Greek karyon “nut, kernel,” + from Latin typus “figure, image, form, kind,” from Greek typos “dent, impression, mark, figure, original form,” from root of typtein “to strike,...

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