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Synapsis, the pairing of homologous chromosomes, is unique to

  • A.prophase I of meiosis
  • B.prophase of mitosis
  • C.metaphase II of meiosis
  • D.telophase of mitosis

Answer: A

The paired structure is called a bivalent or tetrad, since it contains four chromatids. Nothing comparable happens in mitosis, where homologues behave independently. Pairing is what makes crossing over between homologues possible at all.

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