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MUTATION

 What is mutation?

Sudden heritable change in genetic material of an organism is called as mutation.

Mutation are source of discontinuous variation.

Mutation was first observed by Seth Wright.

Frequency of mutation at present is 1×10^(-6) (1cell in : 1 million - cell). But it will increase in future due to pollution and destruction of ozone layer. 



Mutation in    Corona virus -                 Mutation in corona virus is slow . Compared with HIV , SARS - COV - 2 is changing much more slowly . After Saver Acute Respiratory Syndrome (SARS) virus began circulating in humans ,for instance,it developed a kind of mutation called a deletion that might have showed its spread. 

Causes of mutation -

• Mutation can be caused by exposure to specific chemicals or radiation.

• alfa , beta , gamma and X  - rays can also causes mutation .

• Chemical mutation are more harmful than radiation because body is not protected against chemicals. 

           Pesticides,DDT , mustard gas , Nitrous acid are example of chemical mutagens. 

Also read -Black fungi - mucormycosis


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