Fruit such as bananas
Cheese cloth (or coffee filter)
Tooth picks or paper clip
Place alcohol in ice bucket and keep for later
Prepare “DNA extraction solution”: add 1 tsp baking soda, 1 tsp dish soap and ¼ tsp salt to ½ cup of water in a becher.
Put 1 1-inch slice of fruit in a small bowl and smash with a spoon or mortar and pestle.
Add 3-4 tbsp “DNA extraction solution” to the bowl and grind with the spoon until the fruit is well pulverized.
Place the cloth on top of a narrow becher. Filter the DNA extract.
Add an equal volume of the cold rubbing alcohol, mix by swirling. Wait ~ 5 min. or more.
“Fish” out precipitated DNA with a paper clip hook.