DNA’s long name is deoxyribonucleic acid. It’s a molecule that carries an important code – the genetic code. DNA lives in the cells of your body. This code tells your body how to work and act. Your DNA impacts everything from your hair color to determining if you’re at risk of certain diseases or if you carry a genetic disorder. Everything that lives (including plants and animals) carries DNA. While all humans have the same genes arranged in the same way, the few differences within our human genome are what make us different from one another, or in some cases (like ancestry DNA testing) it makes us the same.