nondisjunction

non·dis·junc·tion

 (nŏn′dĭs-jŭngk′shən)

n.

The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis.

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non′dis·junc′tion·al adj.

nondisjunction

(ˌnɒndɪsˈdʒʌŋkʃən)

n

(Genetics) the failure of paired homologous chromosomes to move to opposite poles of the cell during meiosis

Thesaurus

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)