This lab shows students how to extract DNA from human cheek cells. You'll need Gatorade, dish soap (dilute any brand, like Joy, Palmolive, etc, with water) and rubbing alcohol. Use 10 mL test tubes, so you'll have about 4mL of soap/gatorade with 4 to 5 mL of alcohol. Be patient. The strands of DNA take 10 to 15 minutes to form.