A '''mutagen''' is a substance that causes [[mutation]]s to [[DNA]] and an organism's genome. This causes a number of diseases and is closely related to [[Carcinogen|Carcinogenic]] substances. In some cases, things like radioactive materials, can cause both cancer, as well as birth defects. | A '''mutagen''' is a substance that causes [[mutation]]s to [[DNA]] and an organism's genome. This causes a number of diseases and is closely related to [[Carcinogen|Carcinogenic]] substances. In some cases, things like radioactive materials, can cause both cancer, as well as birth defects. |