CYCLE ORDERLINESS. “Because the cell division is conducted in an orderly manner, the progression of the cell cycle is highly coordinated. Premature entry of a cell into the next cell cycle phase would result in significant propensity for genomic alterations. Cell cycle checkpoints are built to ensure that progression from one phase to the next is under a condition of minimum risk of genomic alteration.”
http://www.sciencedirect.com/science/article/pii/S1535610803000278