Thames & Kosmos Genetics & DNA Lab handleiding

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Thames & Kosmos

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Handleiding

2 x measuring cup

(50 ml dish soap

in total)

1 tsp. salt

Isolating Genetic

Material

YOU WILL NEED

→ brown bottle with cap

→ plastic spatula

→ denatured alcohol

(methylated spirits)

→ table salt

→ dish soap

→ spoon

→ knife

→ tomato

→ freezer

→ blender or hand blender

→ two large empty yogurt

containers (one yogurt

container should be large

enough for the hand blender

to fit inside of it)

HERE’S HOW

1. The night before your experiment, ﬁll the

brown bottle with denatured alcohol, and

place it in the freezer to let it get nice and

cold before the experiment.

2. Now you’ll freeze the genetic material from

the cells. Cut half a tomato into very small

pieces and place the pieces in the large

yogurt container.

3. To the other yogurt container, add 50 milli-

liters of dish soap (twice the capacity of the

measuring cup) and one teaspoon of salt.

4. Stir everything well with the spatula and

pour it over the ﬁnely diced tomatoes.

5. Now puree everything carefully with the

blender. Be careful not to spray it all over

the place! A lot of foam will form because

of the soap. The foam will get in your way,

so it should be removed with the spoon.

Experiments

1 through 4

are meant to

be done in

sequence.

Safety note: For denatured alcohol, see the “Information

about hazardous materials” on the inside front cover.

Isolating Genetic Material | 7

EXPERIMENT 1

You must have an adult help

you when using the blender!

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