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In anaphase I of meiosis, what separates?

  • A.sister chromatids, each moving to opposite poles
  • B.the two centrioles making up the centrosome
  • C.the newly formed nuclear envelopes of the daughters
  • D.homologous chromosomes, each still of two chromatids

Answer: D

Sister chromatids stay together through the first division and separate only in anaphase II. This is the essential difference between the two meiotic divisions and the commonest thing to get wrong. Homologues part first, chromatids second.

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