While blizzards often feature extreme cold and heavy snow, there are actually no temperature or snow depth requirements for a storm to qualify as a blizzard. Occasionally, blizzard conditions will present when there is no precipitation.
Definition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.efinition. A Mutation occurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed.
Mutations to DNA lead to changes in the proteins the cell produces, which modify the way the cell behaves, and can ultimately lead to diseases such as cancer. Exposure to radiation is considered a mutagen, meaning that it causes mutations in DNA.ffect of Ionizing Radiation. Ionizing radiation, the type of radiation released by radioactive materials, also contributes to DNA mutation. Like UVB, ionizing radiation causes direct DNA damage that lead to mutations.