A jellyfish gene that makes a canola plant glow fluorescent green under ultraviolet lights gives scientists at the University of North Carolina a powerful tool for studying the transfer of genes from genetically modified plants to their wild relatives. If a canola plant that has been engineered to contain the jellyfish gene breeds with an unmodified plant, the offspring will contain the jellyfish gene as well. Cross-pollination of genetically modified plants with nonmodified crops and wild relatives is a major concern of farmers and environmentalists alike.