Put the events of meiosis I in order, beginning with the earliest event at the top.
1. Replicated chromosomes condense, form bivalents, and crossing over occurs.
2. Nuclear envelope is completely broken down and spindle apparatus is entirely formed.
3. Bivalents are aligned along the center of the cell.
4. Homologous chromosomes separate and move toward opposite poles.
5. Chromosomes decondense and nuclear envelope.