The Genes that speed’s up cell divisions are called Oncogenes.
Proto-oncogenes are genes that normally help cells grows well. When a Proto-oncogene mutates (changes) or there are too many copies of it, it becomes a "bad" gene that can stay’s on, or activated when it’s not supposed to be.
When this happens, the cell grows out of control and makes more cells that grow out of control. This can lead to cancer. This bad gene is called an oncogene.
For example, Let us take a cell for a car. For a car to work perfectly; there must be a perfect ways to control how fast it goes.
A Proto-oncogene normally functions in a way much like that of the car gas pedal. It helps control how and when the cell grows and divides. An oncogene is like a gas pedal that’s stuck down, which causes the cell to divide out of control.
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