As reported in Journal of Anatomy & Physiology: Current Research article Practical Genetics by Noha Lotfy Ibrahim “Genetic testing is defined as “the investigation of human DNA, RNA, chromosomes, proteins and certain metabolites to notice heritable disorder-related genotypes, mutations, phenotypes or karyotypes for clinical purposes.” Such purposes consist of predicting risk of diseases and develop curative strategies. Prenatal, newborns, carriers and families in high risk, are included. Clinical data that include the finding of the physical examination, the medical and family history, is essential to select the significant diagnostic test and to observe the interpretation of the results”.Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule.