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A sister chromatid is a two identical copies of chromatid connected to each other by centromere.

Metaphase chromosome is composed of two sister chromatids, which are held together by the centromere. During anaphase II the sister chromatids separate.

REFERENCE:

  1. Image: http://iws.collin.edu/biopage/faculty/mcculloch/1406/outlines/chapter%2011/Ar14-2a.JPG
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