Final answer:
Uncontrolled mitosis can lead to the formation of tumors or cancer due to the failure of regulation mechanisms in the cell cycle.
Step-by-step explanation:
If mitosis were uncontrolled, it would likely lead to the formation of tumors or cancer. The cell cycle has precise regulation mechanisms that provide "stop" and "go" signals to ensure healthy cellular activity and division. When these control systems fail, perhaps due to genetic mutations or environmental damage, they can lead to uncontrolled cell division. This can result in a mass of abnormal cells, or a tumor.
An uncontrolled cell division can overtake the area, potentially leading to the spread of cancerous cells to other parts of the body and compromising the function of various tissues and organs. Such failures of cell cycle control due to unchecked mitosis are serious and can be fatal if not properly managed.