Binary fission.
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   Prokaryotes  such  as  Escherichia  coli reproduce by a process called
   binary fission.
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   DNA replication begins at the origin of replication.
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   One copy of the origin moves toward the other end of the cell.
   Replication is complete, yielding two chromosomes.
   The plasma membrane grows inward, forming a fission furrow.
   The  furrow  deepens  to  produce  two genetically identical "daughter
   cells".