Gene therapy is the method to correct the defective gene responsible for producing a particular disease. The cloned gene is cut by restriction enzymes and the correct gene is inserted. Gene therapy can be done in two ways.
1. Cells with the correct genes are created in the laboratory. It is then injected into the patient’s body.
2. Viruses are mutated into viruses. It is then introduced into human target cells. The correct gene is inserted into the target cell. As a result, the disease is free.