Mutagens

 Mutagens are environmental substances that cause mutations. 


Mutations can cause cancer or birth defects. 

Mutagens are factors like radiation (X-rays) or organic chemicals ( certain pesticides or compounds in cigarette smoke). 

Lots of mutagens are carcinogens. Mutations in the body cells will likely result in cancer. 

If the mutation occurs in the sex cells (gametes) then the mutation will occur in the offspring.