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What’s the key difference between random/ independent assortment and crossing over?

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Answered Mar 20English
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Benjamin MansourEnthusiastic tutor by day and UCL medic by night!287 students helped

Hi Blake, will try to keep this answer as clear as possible. Independent assortment occurs during Meosis 1, the homologous chromosomes/sister chromatids are aligned at the metaphase plate, and therefore separated to different daughter cells, randomly. Recombination/ crossing over occurs just before this, in the prophase stage of meosis 1! This is where these homologous chromosomes/ sister chromosomes swap tips between each other, forming a set of genetically unique homologous chromosomes in every gamete. Therefore these both occur at different stages, and cause genetic diversity in different ways. Hope this helped! If you have any further questions feel free to message me. Thanks, Ben