Medical Genetics Exposure to too high a level of mutagens can threaten the survival of a species, e. g frog species in the states of Washington and Oregon are facing extinction. This appears to be caused by reduced atmospheric ozone, and the resulting increased level of ultraviolet radiationMedical Genetics Exposure to too high a level of mutagens can threaten the survival of a species; e.g., frog species in the states of Washington and Oregon are facing extinction. This appears to be caused by reduced atmospheric ozone, and the resulting increased level of ultraviolet radiation