3)Types of mutagens a)Physical rays β-rays(β- particles) ° Gamma-rays Neutrons · Ultraviolet rays Particles from accelerators b)Chemical Base analogues and related compounds Alkylating agents · Aides Nitrous acid Hydroxylamines · Antibiotics3) Types of mutagens a) Physical • X-rays • Gamma-rays • Ultraviolet rays •  -rays (-particles) • Neutrons • Particles from accelerators b) Chemical • Base analogues and related compounds • Alkylating agents • Azides • Nitrous acid • Hydroxylamines • Antibiotics