Fewer and fewer oncogenes.
D000818:Animals; D001483:Base Sequence; D002471:Cell Transformation, Neoplastic; D002472:Cell Transformation, Viral; D002678:Chimera; D006801:Humans; D009154:Mutation; D009369:Neoplasms / Q000235:genetics*; D009857:Oncogenes; D011995:Recombination, Genetic; D012190:Retroviridae / Q000235:genetics*; D014161:Transduction, Genetic; D014162:Transfection