Binary fision Most bacterial cells reproduce asexually by binary fision,a process in which a cell divides to produce two nearly equal-sized progeny cells. Three processes: Increase in cell size (cell elongation) 。DNA replication 。Cell division Most bacterial cells reproduce asexually by binary fision, a process in which a cell divides to produce two nearly equal-sized progeny cells. Three processes: • Increase in cell size (cell elongation) • DNA replication • Cell division Binary fision