The process of cell division, or mitosis ... to start when the condensing chromosomes first become visible within the prophase nucleus. The subsequent breakdown of the nuclear envelope terminates ...

Mitosis itself consists of five active steps, or phases: prophase, prometaphase, metaphase, anaphase, and telophase. Before a cell can enter the active phases of mitosis, however, it must go ...

Interphase The cell spends most of its life in this phase. The DNA in chromosomes copies itself ready for mitosis. Prophase The DNA in chromosomes and their copies condenses to become more visible.

To make the move from asexual to sexual reproduction, nature took a system by which parent cells reproduced simply ... If you can see the animated boxes at left, the plugin is already installed.