UK researchers have grown embryos that combine the DNA of one man and two women, a development that could help babies avoid genetic defects. In broad strokes, it works like this: Parents at risk of passing on a genetic disorder fertilize an egg, and the healthy material is extracted and put into the "shell" of an egg from another woman. Junior would still look like his two natural parents.
Which is, of course, a gross simplification of the process, kind of like how the lead researcher at Newcastle University described it: “What we’ve done is like changing the battery on a laptop." The technique could be available in 3 years, along with a fresh debate over designer babies. The London Times has details here and the Telegraph here. (Read more genetic disorders stories.)