Genetics is related to cancer in that cancer results from mutated genes. Some times these genes are passed down through families putting them at greater risk for getting cancers. These substances help regulate the cell so it does not divide too much. Specific genes are responsible for making these proteins. If these genes have defects, or mutations , in them, they produce defective proteins.
Defective proteins lose their ability to perform their job correctly.
The cell then begins to divide more than it should. Lose awareness of surrounding cells Like the proteins that help control how a cell divides, other proteins are involved in letting a cell know that other cells are around. This helps cells to know how much space it has to grow and when it should slow down or stop. Mutations in these proteins cause cell growth to spill over into surrounding tissue. This creates a tumor where cells grow on top of each other instead of in a single layer.