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Nondisjunction definition

nŏndĭs-jŭngkshən
The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis.
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(biol.) The failure of paired chromosomes to pass to separate cells in meiosis.
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The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis.
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(genetics) The failure of chromosome pairs to separate properly during meiosis.
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Other Word Forms

Noun

Singular:
nondisjunction
Plural:
nondisjunctions

Origin of nondisjunction

Nondisjunction Sentence Examples

  • Mosaicism-A genetic condition resulting from a mutation, crossing over, or nondisjunction of chromosomes during cell division, causing a variation in the number of chromosomes in the cells.

  • This event is referred to as nondisjunction.

  • The majority of cases of Down syndrome occur due to an extra chromosome 21 within the egg cell supplied by the mother (nondisjunction).

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Words near nondisjunction in the Dictionary