['Alfalfa. Much of commercially available alfalfa has been genetically modified to contain a gene that makes it resistant to the herbicide Roundup. ... ', 'Canola. It is estimated that about 90% of US canola crops are genetically modified. ... ', 'Corn. ... ', 'Cotton. ... ', 'Papaya. ... ', 'Potato. ... ', 'Soy. ... ', 'Sugar Beet.']