Many DNA tests on the market offer a glimpse into what makes your individual character, including who your ancestors are and some can even analyze your risk for developing certain diseases. Cheddar News spoke with Sam Beeler, chief strategy officer with Nebula Genomics; Eleanor Griffith, a certified genetic counselor; and Dr. Neil Iyengar, a medical oncologist with Memorial Sloan Kettering Cancer Center about the process involved in checking DNA and its effectiveness.