This is possible thanks to the information in DNA 〈or deoxyribonucleic acid〉Your hair and every cell in your body contains your own unique DNA. It can tell you a lot about your family ,health,and personality.
DNA was discover by a German scientist,Friedrich Miescher ,in 1869, but nobody realized its importance then.Other scientists thought that it was too simple to contain the map of how we are made！In 1953 , a group of British scientists at Cambridge University finally discovered the structure of DNA and how it worked. They were given the Nobel Prize for Medicine in 1962.
Gradually ,scientists learned to read more and more of the information in DNA.In1986 ,for the first time DNA testing was used by the police. Some DNA is usually left by a criminal at the place where the crime was committed.This can be matched with DNA form a suspect.The test shows if the suspect is guilty.
In 1990 the Human Genome Project was begun in the U.S.Scientists wanted to make a map of the 3 billion chemical letters in human DNA.Over 1000 scientists all over the world worked on the project,and it took 13 years. With this information ,it is possible that a cure for many diseaes will be found in the future.But it also brings with it many questions.Do we want to be able to choose what our babies will look like, or use DNA tests to pick the best person for a job？
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