nondisjunction
noun Etymology: International Scientific Vocabulary Date: 1913 failure of homologous chromosomes or sister chromatids to separate subsequent to metaphase in meiosis or mitosis so that one daughter cell has both and the other neither of the chromosomes • nondisjunctional adjective

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Nondisjunction — ( not coming apart ) is the failure of chromosome pairs to separate properly during meiosis stage 1 or stage 2. This could arise from a failure of homologous chromosomes to separate in meiosis I, or the failure of sister chromatids to separate… …   Wikipedia

  • Nondisjunction — Nondisjunction, Ausbleiben der Trennung von Schwesterchromatiden eines Chromosoms in der Mitose (mitotische Disjunction) oder von homologen Chromatiden in der Meiose (meiotische Disjunction); führt zu ⇒ Aneuploidie …   Deutsch wörterbuch der biologie

  • nondisjunction — [nän΄dis juŋk′shən] n. Biol. the failure of paired chromosomes to pass to separate cells in meiosis …   English World dictionary

  • Nondisjunction — Failure of paired chromosomes to disjoin (separate) during cell division so that both chromosomes go to one daughter cell and none to the other. Nondisjunction causes errors in chromosome number such as trisomy 21 (Down s syndrome) and monosomy X …   Medical dictionary

  • nondisjunction — n. [L. non, not; disjunctus, unyolked] The failure to separate of paired chromosomes during meiosis …   Dictionary of invertebrate zoology

  • nondisjunction — /non dis jungk sheuhn/, n. Biol. the failure of chromosomes to separate and segregate into daughter cells at division. [1910 15; NON + DISJUNCTION] * * * …   Universalium

  • nondisjunction — noun The failure of chromosome pairs to separate properly during meiosis See Also: disjunction, nondisjunct, nondisjunctive …   Wiktionary

  • Nondisjunction — Non|dis|junc|tion, auch Non Dis|junc|tion [nɔndis dʒʌŋkʃən] die; <zu engl. non »nicht « u. disjunction »Trennung«> unregelmäßiger Teilungsprozess von ↑Chromosomen bei der Reifeteilung (Biol.) …   Das große Fremdwörterbuch

  • nondisjunction — n. nonseparation of paired chromosomes during cell division (Biology) …   English contemporary dictionary

  • nondisjunction — non·disjunction …   English syllables

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