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Chromosomes P1 Prophase Condense Nuclear Envelope Disintegrates Nucleolus

This card describes Prophase 1 of meiosis, where chromosomes condense, the nuclear envelope breaks down, and homologous chromosomes pair up to form bivalents, with crossing over occurring.

Prophase 1: chromosomes condense, nuclear envelope disintegrates, bivalents form with crossing over.

Front What happens at P1?
Back Prophase 1:
  • Chromosomes condense, nuclear envelope disintegrates, nucleolus disappears
  • Spindle formation begins
  • Homologous chromosomes pair up, forming bivalents & crossing over occurs

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