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Studying DNA

All genes are made of DNA. You have a copy of all your genes in most of the cells in your body, although only certain genes are used in each cell. Scientists can use cells from almost any part of your body - the white blood cells in your blood, for example - to obtain a sample of your entire DNA. Once it is out of the cells and in a test tube, your DNA can be examined in detail.

Once your DNA is extracted from your blood, it can be examined in detail.
Once your DNA is extracted from your blood, it can be examined in detail.
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