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Genetic Variation Watch

    • Thread Starter

    For my assignment I have to produce a report that describes the following events in meiosis and explain how they lead to genetic variation in an organism
    a)Crossing over
    b)Random assortment of chromosomes
    c)Random assortment of chromatids
    I have discussed genetic variation due to crossing over and random assortment of chromosomes but I don't understand the third event regarding chromatids
    Can anyone help?

    Random assortment of homologous chromosomes happens in meiosis I whereas the random assortment of non identical sister chromatids happens in meiosis II. The mechanisms are exactly the same as they both reshuffle the genetic material - they just happen at different stages in the cell cycle.
    • Thread Starter

    Thk you so much!!
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