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I. What is DNA A. It’s a long chemical molecule B. The instructions for making you. C. Contained in all of your cells D. No two people have exactly the same DNA E. Although related people will have similar DNA F. The more closely they are related, the closer their DNA will be II. How is it used to solve crimes? A. Everywhere you go, you shed cells B. At crime scenes, investigators can look for them 1. skin 2. hair 3. blood 4. any body fluids C. Once it’s been collected, it can be compared against 1. samples from the suspect 2. a DNA database D. If a match is found, the suspect was at the crime scene E. In many cases, the lack of a match has been used to exonerate people convicted of a crime III. Why isn’t it used in all cases? A. Sometimes no DNA is found at the scene B. Suspects are starting to take steps to prevent leaving any C. DNA can be washed away or contaminated D. There is a massive backlog of DNA evidence waiting to be analyzed