The video shows a PtK1 cell that completed mitosis with persistent chromosome bridges (induced by treatment with a radiomimetic drug).
The cell attempts cytokinesis, but eventually the cleavage furrow regresses, giving rise to a single tetraploid cell. Phase contrast is shown in the left panel, DNA labeling in the middle, and the overlay (phase contrast, red; DNA, green) is shown in the right panel.

Elapsed time is displayed in hh:mm:ss