Discussion
State whether the following is true or false.
In mitosis the two kinetochores of a chromosome attach to opposite poles, while in meiosis I they attach to the same pole.
Answer: C
Correct answer: True
This is the mechanical difference that makes the first meiotic division reductional. In mitosis the two kinetochores of a replicated chromosome face opposite poles, so the sister chromatids are pulled apart. In meiosis I they are fused to face the same pole, so the sisters travel together and it is the two homologues, held by chiasmata, that are separated instead. The mitotic arrangement is restored for meiosis II.
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