Let´s look at an example: If you know that different members of your family have breast or ovarian cancer, you can check whether your genetic make-up shows a predisposition to this disease or whether you have no such traits at all. People with a strong family history of diabetes, heart disease, frequent infections, etc. should consider a DNA test. Genetic testing is a type of medical examination that identifies any changes in genes to check or confirm a genetic condition and determine a person’s likelihood of developing a genetic condition.