The limits of ancestry DNA tests, explained
23andMe wants to sell you vacations based on your DNA. But what are they really basing that on? By Brian Resnick@B_resnickbrian@vox.com Updated May 23, 2019, 10:41am EDT Danush Parvaneh/Vox Identical twins have virtually identical DNA. So you’d think if a set of twins both sent in a DNA sample for genetic ancestry testing, they’d get the exact same […]