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What is it called when pairs of homologous chromosomes fail to SEPARATE normally

during MEIOSIS.

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Answer: Nondisjunction occurs when homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chromosome number. Nondisjunction may occur during meiosis I or meiosis II.

Step-by-step explanation:

2 cells will have the normal haploid number of chromosomes. Additionally, one cell will have an extra chromosome and one will be missing a chromosome

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