According to The Wikipedia Website, Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. DNA, which was discovered by the Swiss physician Friedrich Miescher in 1869, plays an important role in the world. DNA determines physical characteristics and proves the paternity of a child. For example, both X and Y genes are DNA that determines gender which means who is male or female. Also, some of others control human hair color, eye color, skin color, and other traits. If your child got lost 10 or 20 years ago in the foreign, how should you look for and identify your child? You should bioassay DNA from yourself and your child. When DNA is 99.99% similar, that proves the paternity of a child. In 1997, the Cloning Dolly that made a copy of DNA technology was born, so it affects our biological conditions. We should use this technique to cure a lot of diseases, and maybe we won’t die on the earth. In conclusion, the most important discovery in the 21 century is DNA.
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