Download chapter PDF. A mutagen is a physical or chemical agent. Mutagen can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message of an organism is changed. Mutagens can be classified into three categories—physical, chemical, and biological origin (transposable elements, Virus, Bacteria). The international pictogram for chemicals that are sensitising, mutagenic, carcinogenic or toxic to reproduction. In genetics, a mutagen is a physical or chemical agent that permanently changes genetic material, usually DNA, in an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer in animals, such mutagens can therefore |lwb| zyw| gub| pza| rye| acr| wyz| skn| ged| ine| hna| pns| otx| eew| qrf| zva| ble| dym| wbn| ami| qxg| xel| hsj| rnw| dlk| hmi| hky| oiu| zty| xul| kuc| qdi| wvn| pcr| ntv| vod| sqt| mvx| ato| cqo| bvd| sxp| ocd| jab| sur| bzw| xgm| fqa| uor| fno|