DNA makes you who you are. It has all your heredity info, like your hair color, your personality, etc. No two person's DNA is the same, not even twins

The main role of DNA is to store information over long periods without any significant loss of information contained in it. It is the precursor for all the metabolic reactions taking place in our body (involved may be directly or indirectly). DNA is so important because it does lot of things to say if you were found dead with no ID or anything they could use your DNA to figure out who you were, DNA is your identity, and it confirms the colors and shapes of what makes up you. It also shows if you have any diseases like hemophilia.

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