Binary fission is the form of asexual reproduction and cell division used by prokaryotic organisms (such as bacteria or archea). This process results in the reproduction of a living prokaryotic cell by division into two parts which each have the potential to grow to the size of the original cell.
Mitosis and cytokinesis are not the same as binary fission. The ability of some multicellular animals, such as echinoderms and flatworms, to regenerate two whole organisms after having been cut in half, is also not the same as binary fission. Neither is growing plants from cuttings.
Binary fission is asexual; the organism splits directly into two equal-sized offspring, each with a copy of the parent's genetic material. Binary fission is the usual type of reproduction in prokaryotes, the more familiar of which are known as bacteria.
After this replicational process, cell growth occurs.
Cell division in bacteria is controlled by the septal ring, a collection of about a dozen proteins that collect around the site of division. There, they direct assembly of the division septum.the cell wall and plasma membrane starts growing transversely from near the middle of the dividing cell. The dividing septum originates centripetally and separates the parent cell into two nearly equal daughter cells ,each having a nuclear body
The cell membrane then invaginates (grows inwards) and splits the cell into two daughter cells, separated by a newly grown cell plate.