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Decoding Humanity
  From DNA to a human
  The race for the human genome
  How scientists decode DNA
 FROM DNA TO A HUMAN
From DNA to human
Introduction

All the biological instructions needed to make a human being can be written in just four letters. But the book of those instructions is over three billion letters long. Here, BBC News Online shows how you go from A, T, G and C to a whole person.

Click on the stages to learn how DNA makes a human
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