Mitotic cell division. Coloured transmission electron micrograph (TEM) of a skin cell dividing by mitosis, the asexual replication of a cell into two new daughter cells (orange). This is late telophase, the fourth stage of mitotic division, when the cell's genetic material (green) has been separated via the spindle (centre) into two identical populations. The nuclear membranes have reformed around the genetic material and the process of cytokinesis, the separation of the two new daughter cells, will shortly occur. Magnification: x5500 at 10 centimetres wide.