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9 December, 19:39

Why were two crossovers needed on one chromatid arm?

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  1. 9 December, 22:39
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    Crossover occurs when two chromosomes, normally two homologous instances of the same chromosome, break and then reconnect but to the different end piece ... If chromosomes break on both sides of the same centromere and rejoin to exclude the centromere, the result can be one chromosome being lost during cell division
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