Meiosis involves a reduction in the amount of genetic material. Meiosis comprises two successive nuclear divisions with only one round of DNA replication. Four stages can be described for each nuclear division. These are called sister chromatids.
Homologous chromosomes align at the equatorial plate.
Crossing-over can occur during this stage. Homologous pairs separate with sister chromatids remaining together. Two daughter cells are formed with each daughter containing only one chromosome of the homologous pair. Chromosomes align at the equatorial plate. Centromeres divide and sister chromatids migrate separately to each pole.