By the Num­bers

Newsweek - - News -

DNA

Our ex­pe­ri­ence with DNA is fraught. Com­pa­nies that se­quence our genomes con­nect long-lost rel­a­tives but also threaten our pri­vacy. DNA from a tis­sue found in a trash can led to the ar­rest of the Golden State Killer, but plenty of other in­stances of foren­sic ge­net­ics have re­sulted in wrong­ful convictions. Still, the most re­mark­able facts about this thread­like chain of nu­cleo­tides are the most ba­sic.

To­tal num­ber of genes in our DNA.

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