meiosis in which there is a failure of paired homologous chromosomes to separate; results in an abnormal number of chromosomes in the daughter cells
Non-disjunction ("not coming apart") is the failure of chromosome pairs to separate properly during meiosis stage 1 or stage 2, specifically in the anaphase. This could arise from a failure of homologous chromosomes to separate in meiosis I, or the failure of sister chromatids to separate during meiosis II or mitosis.
例句与用法
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Alternatively , like allopolyploids , they may arise by the nondisjunction of chromatids during the mitotic division of a zygote 与异源多倍体相似的是，它们也是在有丝分裂中合子的染色单体不分离形成的。
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Autopoly - ploids may arise from the fusion of diploid gametes that have resulted from the nondisjunction of chromosomes at meiosis 同源多倍体通常可能来自在减数分裂过程中染色体不分离导致的二倍体融合。
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Aneuploidy the condition , resulting from nondisjunction of homologous chromosomes at meiosis , in which one or more chromosomes are missing from or added to the normal somatic chromosome number 非整倍性：在减数分裂的过程中同源染色体不分离而造成的一条或多条染色体的缺失或增加。
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