Why is a chromosome with two centromeres (a dicentric chromosome) unstable? Would a backup centromere not be

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Why is a chromosome with two centromeres (a dicentric chromosome) unstable? Would a backup centromere not be a good thing for a chromosome, giving it two chances to form a kinetochore and attach to microtubules during mitosis? Would that not help to ensure that the chromosome did not get left behind at mitosis?

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Molecular Biology Of The Cell

ISBN: 9780815344322

6th Edition

Authors: Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter

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