|Strawberry DNA Supplies by Fran W|
The following experiment will show you how to pull the DNA out of a strawberry.
1/4 c Water
- Put the strawberry in the zip-top bag, remove the air while closing the bag, and smash it into a puree. It takes about a minute to puree strawberry. Do not break or puncture the bag while smashing.
- Put dish detergent, salt, and water into a plastic cup and mix with a craft stick.
- When the strawberry is liquefied, pour detergent/salt/water mixture into the bag and, without making a lot of bubbles, swish everything around gently for about 30 seconds.
- Put the coffee filter into the plastic cup, fold the filter over the top of the cup and use a rubber band to keep it in place. Leave about two inches of space between the filter and the bottom of the plastic cup.
- Pour the liquid from the bag into the filter. You do not need to use all of the mixture.
- Carefully remove the rubber band and gently squeeze the liquid out of the filter without breaking it. Discard filter when finished, and use the towel to clean your hands.
- Pour in as much alcohol as there is liquid into the cup (about 1/4 cup), and allow it sit for about 30 seconds. You can swirl the cup gently if you want to.
If you use a clear cup, you will be able to see the two colors separately in the cup, and soon you’ll notice a swirling on top of the liquid, that’s the DNA making its way up to the top. After a minute, put your craft stick into the liquid, and pull out the strings of DNA.
Tip: If you want to save the DNA, place it in a clean zip-top bag and refrigerate. It will keep for a while.
If you have all your supplies ready, you can do your experiment while watching the video below, which takes about 9 minutes to watch.