how do mutations occur?

Answer Posted / prasad

mutations is nothing but sudden change in genetic sequence
of DNA or alteration of genetic material....
This can be occur by 3 factors i.e;physical,chemical and
environmental........
physically by radiations such as U.V,X-rays.
chemically by ethidium bromide,benz pyrenes.
environmentally by industrial
pollutens/effluents,afflotoxins.

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