Broomhill School P7 Room 22

Extracting DNA from onions

January 30, 2017 by Mrs Shaw | 0 comments

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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