A genetic disorder is an inherited medical decease caused by a DNA abnormality. Even Common Genetic disorders are life-threatening. They can cause developmental and intellectual delays or damage the lungs and digestive system. Another example of Genetic disorder is Thalassemia which is a blood disorder involving less than normal amounts of an oxygen-carrying protein. There really are a variety of genetic disorders which can do all sots of harmful things to the body and the reaction of others can be unpredictable.