nondisjunction

Noun
  1. Meiosis in which there is a failure of paired homologous chromosomes to separate;
    Results in an abnormal number of chromosomes in the daughter cells (synset 113544082)
    is a type of: meiosis, miosis, reduction division - (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)

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