Gene Therapy : If a person is born with a genetic disease, is there a gene therapy system to treat this disease? Gene therapy is one such effort. Gene therapy involves methods of correcting identified gene defects in a child or fetus. In this, genes are introduced into the cells or tissues of a person to treat the disease. To treat cells with genetic defects, normal genes are transferred to the person or embryo, which compensate for the dysfunctional gene and perform its functions