Definition of nondisjunction
: 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
From the M-W Editors
Origin and Etymology of nondisjunction
International Scientific Vocabulary
First Known Use: 1913
Medical Dictionary
nondisjunction
playMedical Definition of nondisjunction
: 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
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Britannica.com: Encyclopedia article about nondisjunction
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