Arctic Granny (right), a GMO variety created by Okanagan Specialty Fruits, got the gren light from federal regulators Friday. The apple doesn't turn brown like a conventional Granny Smith apple (left). Okanagan Specialty Fruits hide caption

itoggle caption Okanagan Specialty Fruits

A couple of male, genetically modified Aedes aegypti mosquitoes take flight. Dr Derric Nimmo/Oxitec hide caption

itoggle caption Dr Derric Nimmo/Oxitec

Processing often degrades a GMO ingredient to the point of making its DNA – or anything else that's genetically modified, like proteins — undetectable in the finished product. That's the case, for example, with vegetable oils made from GMO canola or soybeans. Takao Onozato/Corbis hide caption

itoggle caption Takao Onozato/Corbis

Scientists reprogrammed the common bacterium E. coli so it requires a synthetic amino acid to live. BSIP/UIG via Getty Images hide caption

itoggle caption BSIP/UIG via Getty Images
Samuel LaHoz/Intelligence Squared U.S.

Mattheos Koffas (left), a biochemical engineer at Rensselaer Polytechnic Institute, and Andrew Jones, a graduate student in his lab, with a flask of microbe-produced antioxidants. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Corn farmer Jerry McCulley sprays the weedkiller glyphosate across his cornfield in Auburn, Ill., in 2010. An increasing number of weeds have now evolved resistance to the chemical. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP

Labels on bags of snack foods indicate they are non-GMO food products. This fall, Colorado and Oregon will be the latest states to put GMO labeling on the ballot. Robyn Beck /AFP/Getty Images hide caption

itoggle caption Robyn Beck /AFP/Getty Images

A corn purchaser writes on his account in northwest China in 2012. In November 2013, officials began rejecting imports of U.S. corn when they detected traces of a new gene not yet approved in China. Peng Zhaozhi/Xinhua/Landov hide caption

itoggle caption Peng Zhaozhi/Xinhua/Landov

General Mills' original Cheerios are now GMO-free. But you won't find a label on the box highlighting the change. David Duprey/AP hide caption

itoggle caption David Duprey/AP

A customer shops for produce at the Hunger Mountain Co-op in April 2013 in Montpelier, Vt. More than a dozen food cooperatives supported the bill that would require the labeling of genetically modified foods. Toby Talbot/AP hide caption

itoggle caption Toby Talbot/AP

A woman shops at a supermarket in New York City. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images