Genes are passed on from parent to child. Changes in the genes that cause a disorder are also passed on to the child, thus some diseases like diabetes, heart issues, cancer, certain clustering of infectious diseases, etc. run in the family. With the advancement of science and technology, DNA tests are being developed which give a clear understanding about your health, possible diseases, and prevention. Genetic testing is gaining importance all over the world. Learning about such common genetic diseases helps in making safe choices to stay healthy.