Sara read that down syndrome is mostly due to nondisjunction of chromosome 21. She asked her friends for the meeting of nondisjunction which of her friends had the correct meaning A. Anna said that it is the failure of sister chromatids separate during meiosis

B. Beth said that it is a failure of humongous chromosomes to separate during meiosis

C. Jane said that it is the failure of chromosome 21 to separate into daughter chromatids during mitosis

D. Kerry said that it is a failure of cells containing chromosome 21 to separate during meiosis to form gametes

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