International A Level Biology / Mitosis, meiosis and reproduction
Independent assortment and crossing over
Edexcel International A Level Biology (YBI11), chapter 8: Mitosis, meiosis and reproduction, specification point 3.10. Part of the full course.
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Independent assortment and crossing over create genetic variation during meiosis by producing different combinations of alleles in gametes. Independent assortment gives 2ⁿ chromosome combinations, while crossing over reshuffles alleles between chromatids.