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Pages 25-26

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From page 25...
... The human genome is a vast jungle in which to hunt for genes causing inherited diseases. Even a one-letter error in the 3x109 base pairs of deoxyribonucleic acid 3)
From page 26...
... The number of genes in the 3 x 109 nucleotides of the human DNA sequence is uncertain, although a reasonable guess is 50,000 to 100,000, based on the estimate that a typical gene is about 30,000 nucleotides long. This estimate is only rough, because genes can vary from 200 base pairs to 2X106 base pairs in length, and because it is hard to draw a truly random sample.


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