The activities of a cell can be divided into 3 major stages: interphase, mitosis, and cytokineses. Even mitosis is divided into 4 stages: prophase, metaphase, anaphase, and telophase. In propahse, replication of DNA takes place. In metaphase, spindle fibers start to form and attaches to chromosomes. Then in anaphase, chromatids pulls the chromosomes to the opposite of the cell. In telophase, cleavage between cells appear and nuclear membranes starts to form again. Then two new cells appear.Ta-da!