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| 简 介 |
DNA(Deoxyribonucleic acid)is one of the most important discoveries in science.DNA is the plan for the human being，as a blueprint is the plan for a building.DNA makes a person look the way he does.A person’s DNA comes from a mixing of his parents’DNA.That’s why a child looks like his parents.But，besides controlling things such as height and hair color，DNA can also give people diseases.Scientists are now studying DNA to cure diseases.
In the seventies，scientists developed a process called recombinant (重新组合) or RDNA.Although it sounds difficult to understand，RDNA simply means taking DNA from one animal or plant and putting it into another.By doing so，scientists can create new beings.In so doing，scientists can better understand DNA，especially what parts of DNA do what.After they understand DNA，scientists can begin to cure diseases.Often，the new being created will itself be the cure.
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