Can sister chromatids of a chromosome crossover?

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Can sister chromatids of a chromosome crossover?

Biology
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Yes they can. The actual name for this is 'chromosomal crossover' or, simply 'crossing over'. This occurs during meiosis, when the exchange of genetic material between homologous chromosomes results in recombinant chromosomes. It is one of the last phases of genetic recombination, which occurs during prophase I of meiosis. I hope this helped you. :)
|dw:1339009279963:dw| can the 2 sister chromatids crossover like this? I knew that homologous chromosomes can exchange genetic material. But I wonder 2 sister chromatids from one chromosome can do this or not.
Well, no. Not if we're trying to avoid mutation! :) If they were sister chromatids crossing over, they'd be giving each other the same information. Two NON-sister chromatids give each other different information, which results in the 4 normal haploid cells. So, basically, sister chromatid crossover IS possible, but it would NOT be a desired occasion. Hope this helped you! :)

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I see. Thanks :)
You're welcome! :)

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