Meiosis has 2 division
I - homologous chromosome separate
II - chromatids separate
diagram of meiosis
Meiosis I
Prophase I - chromosome condense
- crossing over
- homologous chromosome pair up
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Metaphase I - bivalents move to equator
- microtubules attach at centromere
- chromosome assort themselves independent of each other
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Anaphase I - double stranded chromosome pulled to opposite poles
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Telophase I - chromosome reach opposite poles
- nuclear envelope reform making two daughter cells that have half the number of chromosome as parent
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NB.interphase may occur between divisions of meiosis I and meiosis II
Meiosis II
Prophase II - nuclear envelope break up
- crossing over
- homologous chromosome pair up
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Metaphase II - Individual double stranded chromosome lie at equator
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Anaphase II - sister chromatids separate and move to opposite poles (random segregation)
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Telophase II- nuclear envelope reform making four haploid daughter cells that have half the number of chromosome and are genetically different from parent cell
