DNA carries genetic information from "summary" of A Short History of Nearly Everything: Special Illustrated Edition by Bill Bryson
It is a remarkable thing that all the information that makes you you is contained in a molecule so small that we need a powerful microscope just to see it. The molecule is DNA, and it is found in every cell in your body. Each cell contains a complete set of instructions for making you. These instructions are incredibly detailed, with each cell having a complete copy of your DNA. DNA is a long, spiraling molecule made up of four different chemicals called bases. These bases are arranged in a sequence that spells out the instructions for making you. The sequence of bases in your DNA is unique to you, like a genetic fingerprint that sets you apart from every other person on Earth. What makes DNA so remarkable is that it not only contains the instructions for making you, but it also carries the instructions for making every living thing on Earth. All living things, from bacteria to elephants, have DNA that is made up...
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