Everyone has genes. They are instructions for you r body. Genes determine what your body looks like, what color hair and eyes you have, and more. your genes live in your DNA - long strands of information that make your body work. your DNA is unique, Which means no one else has the same DNA as you. One strand of DNA makes up a chromosome. Most humans have 23 pairs of chromosomes(46 total) in every cell in their body. We inherit chromosomes from our parents: we usually get 23 from dad and 23 from mom