Gene therapy is a highly controversial topic and there are reasons why people are either for or against it. All of us carry defective genes and may not know it. Gene therapy is a route to tackle the fundamental biological cause of the disorder: the faulty gene being replaced by a healthy gene. Genes are the fundamental physical and functional unit of heredity. Each genetic makeup of a person is unique and this is what makes us different from one another. A mutation in any one of these genes can result in a disease, physical disability or shortened life span. These mutations can be passed from one generation to another. With germ-line gene therapy, the inherited diseases or physical conditions due to these mutations could be eliminated. Germ-line therapy should be practiced despite the ethical claims, because it is a long-term solution to save the future generations from dealing with the defective gene pool. Gene therapy is an experimental form of treatment that uses gene transfer...