non·dis·junc·tion (n n d s-j ngk sh n)n. The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis. non dis·junction·al adj. |
nondisjunction [ˌnɒndɪsˈdʒʌŋkʃən]
n
(Life Sciences & Allied Applications / Genetics) the failure of paired homologous chromosomes to move to opposite poles of the cell during meiosis
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| Noun | 1. | nondisjunction - meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells 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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