DNA extracting solution (mix about 1 tablespoon of dish detergent and 1 teaspoon of salt into 1 cup of water)
Plastic cup
Gauze, cheesecloth or coffee filter
Rubber band
Test tube (or smaller cup)
Dropper or spoon
Denatured alcohol eg. methylated spirits or rubbing alcohol (put in the freezer for best results)
Place a strawberry in a zip-closure bag and remove most of the air before you seal the bag.
Mash the strawberry through the bag in your hand. Do not hit against the table as this may damage the DNA.
Add 2 tablespoons of the DNA extracting solution.
Continue mixing and mashing the bag in your hand.
Place the piece of gauze or cheesecloth over the opening of the cup, securing it with a rubber band.
Carefully pour the strawberry mixture into the cup making sure to catch the solids with the gauze.
Take a dropper or spoonful of the liquid out of the cup and place in the test tube or smaller cup.
Add a dropper or spoonful of the alcohol to the test tube. Take care not to tilt or tip the test tube; do not mix the two liquids.
Observe the line between the strawberry mixture and the alcohol. You will notice a white thread-like cloud appearing at this line. This is strawberry DNA. The DNA will clump together and float to the top of the alcohol layer.
Take a photo of your findings and share your scientific success with your friends and family!
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