At today's backyard barbeques, we enjoy corn on the cob with hundreds of sweet juicy kernels. But if we were eating teosinte, the wild ancestor of corn, we would be lucky to enjoy a dozen kernels per ear. In fact, many of our modern crops bear little resemblance to their wild ancestors. Thanks to thousands of years of breeding, or "artificial selection," today's crops are tasty and produce high yields. However, they may have undergone additional changes that are harder to see (or taste).