问答题 Cloning: Good or Bad? Just before President Clinton heads to the hospital for knee surgery, he asks another Bill Clinton to meet Russian President Boris Yeltsin at an overseas meeting. Meanwhile, a third Bill Clinton is out playing golf, while a fourth is helping daughter Chelsea with a science project. Sound far-fetched? That day may come. Scientists in Scotland recently announced that, for the first time, they have cloned an exact copy of an adult mammal. The cloned baby lamb, named Dolly, has the exact same genes as the adult sheep from which she was coined. In other words, the two are identical twins; only Dolly is six years younger. The goal of embryologist Ian Wilmut, the lead scientist, is to develop a way to raise identical sheep that produce medications for humans.无