DNA gets copied, DNA molecules attach to the cell membrane and the cell membrane elongates and pinches off two identical cells are produced.
Following are the stages of Binary Fission
Step no.1)
The copies are made from the circular chromosome.
Step no. 2)
Then two of the chromosomes are joined to the cell membrane
Step no. 3)
The cell then grows.
Step no. 4)
Then the cell gets elongated until it doubles its original size
Step no. 5)
Cytokinesis happens to produce two new daughter cells.