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If you picked two people in the world at random, sequenced each of their entire genome, and compared their DNA, what would the expected percentage match be?

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Based on fine scale mapping of human genome structural variation, which is expanded on here, according to this study, the amount of genome structural (nucleotide diversity) ranges from 0.1% to 0.4% (look under section "Fine-scale map of human genome structural variation"). Hence humans have an up to 99.9% nucleotide similarity. And according to this study the average proportion of nucleotide differences between a randomly chosen pair of humans (i.e., average nucleotide diversity, or pi) is consistently estimated to lie between 1 in 1000 and 1 in 1500.

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