But there has been a snag: Introducing foreign genes into a cell can cause cancer. (sciencemag.org)
Indeed, because eggs are large cells that are relatively easy to manipulate, they are one of the favored cell types used by biologists to express foreign genes and to test gene function. (firstthings.com)
Thirty years ago, a race was under way to figure out how to efficiently get foreign genes into plants. (sciencemag.org)