Deoxyribo Nucleic Acid, known as DNA, is a complex molecule that contains all the information necessary to build and maintain an organism. All living things contain DNA in their cells. In fact, almost every cell in a multicellular organism has the full set of DNA necessary for that organism. However, DNA does more than determine the structure and function of living things. When organisms reproduce, some of their DNA is passed on to their offspring. This transmission of all or part of an organism’s DNA helps maintain a certain level of continuity from one generation to the next, while still allowing for minor changes that add to the diversity of life.