ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Genetic code. Computer artwork of a baby and a sequence of nucleotide bases. These chemicals, which write the genetic code of DNA (deoxyribonucleic acid), are represented by letters. A stands for adenine, C for cytosine, G for guanine and T for thymine. Each person has a unique genetic sequence.
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