Some, but not all, forms of cancer are caused by exposure to chemicals, or radiation, or viruses. And, different types of cancer are caused by different genetic and environmental factors. If you suspect that you or someone else might have cancer, consult a physician. A variety of factors determine whether a normal cell will become altered into a tumor cell. Genetic factors mean the biochemical aspects of our bodies that are directly determined by the genes you have received from your parents and ancestors.
Genes are a form of information stored in a molecule called DNA, within the nucleus of the cell.
This process results in the formation of tumors. Some forms of cancer can be inherited from your ancestors. In these cases, the gene combination the individual inherited has an increased tendency to develop into a specific form of cancer. Some genetic effects are dominant, while others are recessive. Normal cells have two copies of each gene.