3.37B: Understand that the Incidence of Mutations can be Increased by Exposure to Ionising Radiation (For Example, Gamma Rays, X-Rays and Ultraviolet Rays) and Some Chemical Mutagens (For Example, Chemicals in Tobacco)

 MUTATION: Rare and random change in DNA sequence coding for new alleles for gene

CHANCES OF MUTATIONS CAN BE INCREASED BY:

IONISING RADIATION

Electromagnetic spectrums may cause mutations when in contact with chromosomes in DNA molecules EXAMPLES: Gamma rays, X - rays, Ultraviolet rays

CHEMICAL MUTAGENS

Chemicals such as Carcinogen can increase the rate of mutations such as Tar in Cigarettes EXAMPLES: Tobacco