Events that damage the cell's regulatory apparatus, trapping it in the G1 phase of the cell cycle, cause the uncontrolled division of cells called

The answer is cancer.

Cancer is an uncontrolled division of cells. The regulation of cell cycle is necessary for normal cell division. The first phase of the cell cycle is the G1 phase. If the G1 phase is affected, mistakes in this process lead to the uncontrolled division of cells called cancer.