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Stages of Meiosis

From Regina Bailey,
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Prophase I

Lily Anther Microsporocytes in Prophase I
© John C. Glase

Meiosis Study Guide

Prophase I:
  • Chromosomes condense and attach to the nuclear envelope.

  • Synapsis occurs (a pair of homologous chromosomes lines up closely together) and a tetrad is formed. Each tetrad is composed of four chromatids.

  • Crossing over may occur.

  • Chromosomes thicken and detach from the nuclear envelope.

  • Similar to mitosis, the centrioles migrate away from one another and both the nuclear envelope and nucleoli break down.

  • Likewise, the chromosomes begin their migration to the metaphase plate.

  1. Interphase
  2. Prophase I
  3. Metaphase I
  4. Anaphase I
  5. Telophase I
  6. Prophase II
  7. Metaphase II
  8. Anaphase II
  9. Telophase II

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