This Wednesday in Science class, the seventh grade did an experiment on strawberries to extract their DNA. We did not use bananas because the strawberries DNA is easier to extract. Even though it wasn't the right season, Mr. Jones still bought the strawberries. First we answered a couple of questions about strawberries and DNA. Then we received some beakers, bags, and finally... strawberries! We put the strawberries into the plastic bags, then we started to squish the strawberries with all our might. Then, Davin told Clare to zip it tighter but it actually broke the bag! Mr. Jones helped us though and we continued on the project. We received a cup and a cheesecloth to excess the strawberry juice. We had to wait ten minutes for the strawberry excess to fill the cup. But, luckily it was lunch time. When we got back to class, after lunch, Mr. Jones came around with alcohol to put in the beaker we got. He finally got to us and filled our beaker with the alcohol. Then he explained what we needed to do. We took the cheesecloth off and Davin took the cup of juice. Then he carefully poured the juice into the beaker. We waited five minutes. Strings of DNA formed and started floating to the top. We were absolutely amazed. The strings kept on coming and they soon mushed up into a giant, fluffy, pink ball. Then we wrote and answered more questions and turned in our papers to Mr. Jones.
http://www.genome.gov/Pages/Education/Modules/StrawberryExtractionInstructions.pdf
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May 2017
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