Photo: DNA Varies More Widely From Person to Person, Genetic Maps Reveal

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A new DNA study has revealed that humans show much more genetic variation than was previously believed. Scientists studying how large chunks of DNA differ among individuals found large changes in 12 percent of the human genome.

Here, superimposed profiles of different human genomes reveal the magnitude of differences, with green segments showing DNA gains, red areas representing losses, and yellow portions indicating no difference.

Image courtesy Matthew Hurles/Nature

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