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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
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4. Chromosomes

The total number of genes is not known - estimates range from 30,000 to 120,000. However many there are, they, and all the junk DNA, are wrapped up into bundles called chromosomes. Every human has 23 pairs of chromosomes, one set from each parent.

Click on the stages to learn how DNA makes a human
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