Sister Chromatids

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•  DNA is replicated before meiosis so that all chromosomes consist of two sister chromatids

Meiosis is preceded by interphase, during which DNA is replicated (in the S phase) to produce two genetically identical copies

  • The two identical DNA molecules are identified as sister chromatids, and are held together by a single centromere
  • The sister chromatids are separated during meiosis II, following the separation of homologous chromosomes in meiosis I

Sister Chromatids

meiotic sister chromatids