Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed
1. recombinant DNA technology
2. transgenic mechanism
3. mutation breeding
4. gene therapy
or radiations (like gamma radiations), and then selecting and using those plants that have the
desirable character as a source in breeding. This process |s called mutation breeding,
Use of radiations is not involved in other three options. Recombinant DNA technology
involves transferring of a desired gene (rans gene) from an organism and incorporating
it to host organism by genetic engineering to produce a recombinant to gene therapy is
performed mainly in humans. It involves replacing a defective gene with a normal one.
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