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Thats-me

Does mitosis more closely resemble meiosis I or meiosis II?

  • one year ago
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  1. IBstudent
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    meiosis I

    • one year ago
  2. Thats-me
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    Thanks for answering IBstudent, but how?

    • one year ago
  3. InYourHead
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    It more resembles Meiosis 2. There's something that happens during Meiosis 1 that we don't see in Mitosis. And that's "crossing over." During Prophase 1 of Meiosis 1, the chromosomes from both of your parents wrap around each other, and actually switch parts. Again, this all happens during Meiosis 1. And we don't see that in Mitosis. But during Meiosis 2, things happen more like you normally see in Mitosis.

    • one year ago
  4. IBstudent
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    But in meiosis 2 we get 4 cells containing only one set, the haploid number of chromosomes . In mitosis we get only 2 cells as in meiosis 1

    • one year ago
  5. InYourHead
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    That's true. That's the main difference between mitosis and meiosis. Crossing over happens during Meiosis 1. And before that, the duplicated chromosomes from both of your parents come together, and form "tetrads." These two things we don't see in Mitosis. You're right, after Meiosis 2, there are four cells with one set of chromosomes. In order to get to that point, starting with Meiosis 2, the cells divide much like they do in Mitosis. The duplicated chromosomes all line up, the spindle fibers attach, the chromosomes are pull apart, and then the cell splits.

    • one year ago
  6. InYourHead
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    The question asks us which part of Meiosis is more like Mitosis. They're not exactly alike. That's for sure. You're right, in that the end product for Meiosis 2 is different from Mitosis. What I'm actually looking at is the individual processes for both Meiosis 1 and Meiosis 2. I'm looking at all the steps involved, for each half of Meiosis. And the steps involved in Meiosis 1, (mainly crossing over) seem much less like Mitosis.

    • one year ago
  7. Thats-me
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    Ok, thanks guys. appreciate it=)

    • one year ago
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