Extract Strawberry DNA

Cool Science


extract DNA from strawberries. so fun and science-y we love this project! (you can even try this experiment with your saliva, to see your *own* DNA.)

45 minutes

maker checklist

  • 4 ripe strawberries
  • large cup or jar
  • square of cheese cloth
  • small plastic bowl
  • craft stick for stirring
  • teaspoon for measuring 
  • 1/3 cups water
  • 1 tsp salt
  • 2 tsp blue Dawn dish soap
  • 2 tsp rubbing alcohol
  • funnel
  • test tube
  • pipette
  • small wooden skewer



the day before…. remember to get strawberries! chill your rubbing alcohol in the fridge.


mix together the dish soap, water and salt in a small bowl and set aside. this is your extraction liquid.


trim your strawberries and put them in a sealable plastic baggie. squeeze them with your hands until the strawberries are all mashed up.


add three tablespoons of the extraction liquid to the strawberries in the bag. re-seal the bag, and gently squeeze until combined.


line the funnel with cheesecloth and set it over the double cups. pour the strawberry mixture in; let sit. the liquid will drip through.


pour this liquid into a test tube so that it comes about 1- to 2-inches high.


using a pipette, carefully add an equal amount of the chilled rubbing alcohol to the test tube.
add it slowly so that it trickles in!


let the mixture sit, and watch as the strawberry’s DNA rises up out of the red mixture and into the clear alcohol. cool!


dip the wooden skewer into the solution and catch some of the gooey white stuff. this is the DNA!