An apple turns brown if it is cut in half, which is why its slices are often soaked in antioxidants to prevent this. In 2012, Canadian scientists started releasing two popular apple cultivars, Golden Delicious and Granny Smith, and are planning to introduce Gala and Fuji cultivars, all under the brand name Arctic Apple. The non-browning characteristic could already be found in some apple cultivars, like the newest Slovene cultivar called Majda, but none of them has gained strong commercial recognition. The aim of this research is to prevent the most popular cultivars from turning brown. The same principle applies to these apples as to the previously mentioned onions: it is not about adding genes but about downregulating the activity of the existing ones.