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Either of the two identical copies (chromatids) formed by the replication of a single chromosome, joined together by a common centromere.

Use in clinical context

Prior to cell division each chromosome is duplicated. These duplicated chromosomes remain attached to each other by the centromere until just before the cell divides in mitosis or before the second cell division in meiosis. Aneuploidy results if the chromatids do not separate properly.

Last updated on 31st May, 2019