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What attributes does a chromatid require...

What attributes does a chromatid requires to be classified as a chromosome ?

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Chromatid is one copy of a duplicated chromosome, which is joined to the other copy centromere. The duplication of chromosome material takes place at synthetic phase of cell cycle.
During mitosis, late metaphase and early anaphase, there is longitudinal splitting of chromosomes and thus two chromsome get separated, to get divided into the daughter cells.
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