Apples have the annoying tendency to become brown when cut and kept. There is nothing wrongwith it except looks. A Canadian farmer genetically engineered his apples so that they do not become brown when cut and kept. An apple a day may keep the doctor away, but Carters apple drew a lot of activists to condemn the apples.

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• The technology that goes into Arctic apples is different from that used to make many GMO products. Often, scientists make modified crops by inserting genes from other species into the crop plants’ own DNA. Arctic apples use a newer technique that takes advantage of a process called RNA interference or RNAi. The apples get extra doses of native apple genes. That stimulates an immune reaction in the fruits so that they produce much lower amounts of the protein responsible for browning.

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