Determine if each description below applies to an oncogene, a proto-oncogene, or a tumor suppressor gene. some descriptions may apply to more than one of these gene types. drag the gene types on the left to the appropriate blanks on the right to match the descriptions. gene types can be used once, more than once, or not at all. - gene(s) that could code for a normal growth factor. - gene(s) whose presence can cause cancer. - type of gene(s) found in normal cells and cancer cells. - type of gene(s) found in cancer cells. - type of gene(s) found only in cancer cells. - gene(s) whose absence can cause cancer. - type of gene(s) found in normal cells.