Homologous chromosomes pair up (synapsis). Crossing over (DNA exchange) occurs.
Homologous chromosomes align along center of cell (metaphase plate), the pairs oriented toward opposite poles of the cell.
Homologous chromosomes separate, moving to opposite poles.
Sister chromatids are no longer identical: genetic recombination has occurred.
One set from the paired chromosomes arrives at each pole. The cell divides into two haploid cells.
