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Number of chromatids at metaphase is

1. two each in mitosis and meiosis
2. two in mitosis and one in meiosis
3. one in mitosis and two in meiosis
4. one in mitosis and one in meiosis

Correct answer: two each in mitosis and meiosis

Solution

By metaphase, each chromosome has already replicated and consists of two sister chromatids joined at the centromere. This is true in both mitosis and meiosis (at metaphase I, homologs pair but each chromosome still has two chromatids).

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