Broomhill School P7 Room 22

Extracting DNA from onions

this is what you aim to see

this is what you aim to see

On Friday the class extracted DNA from onions, here are the steps:
You will need:
100g chopped onions
Washing up liquid
Water
Tablespoon
Teaspoon
Surgical spirit
Coffee filter (or any other filter)
Cup (preferably clear)
Salt
Knife
Tub
Step 1: chop the onions
Step 2: Put the onions into a tub
Step 3: Pour the water, salt and washing up liquid into the onion
Step 4: stir gently so as to not cause any bubbles
Step 5: leave for 10 minutes
Step 6: filter the mixture into the cup and add the surgical spirit
Step 7: leave for 20 minutes
Step 8: after the 20 minutes are up there should be white strands floating In your cup

img_3361

THIS IS YOUR DNA!

However as in all science experiments they don’t always work.

onionschopped-onions
By Isla and Heather.

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