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Stages of MeiosisProphase 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.
- Interphase
- Prophase I
- Metaphase I
- Anaphase I
- Telophase I
- Prophase II
- Metaphase II
- Anaphase II
- Telophase II
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