Word: wilmut
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Extraordinary claims, scientists like to say, require extraordinary proof, and none has been more extraordinary in recent years than Scottish embryologist Ian Wilmut's claim that he and his colleagues had cloned a sheep named Dolly from a mammary cell of a pregnant ewe. More than a year later, nobody has managed to reproduce the Dolly experiment, and Wilmut is under growing pressure to prove that his famous sheep is what he says she is. Last week at a genetics meeting at the University of Louisville, in Kentucky, he blandly conceded that there was a "remote possibility" that there could...
...does that mean all the cloning hoopla Dolly set off was for naught? Not quite. What Wilmut is conceding is that Dolly's mom--or should we say her twin sister?--probably had some fetal cells circulating in her bloodstream, and that one of these fetal cells could conceivably have found its way into the laboratory culture from which Dolly sprang. Cloning an embryo from a fetal cell, of course, would not be as big a deal. What made the Dolly experiment so extraordinary was that Wilmut had managed to get the DNA of an adult cell to revert...
...remote possibility" that he used a fetal cell to create her rather than an adult cell. What's the difference? About a year's worth of attention from the world press, since scientists have been able to "clone" animals from fetal cells for about two decades now. As Ian Wilmut of Scotland's Roslin Institute sheepishly admitted to a genetics forum at the University of Louisville, fetal cells might have been present in the circulatory sytem of Dolly's clone mother during the time he took his now-famous 277 genetic samples. "We and everybody else had completely overlooked...
Seed has begun to remind pundits and editorial writers of Dr. Jack Kevorkian, who provokes strong feelings by shattering the taboo against physician-assisted suicide. The technical challenge involved in ending a human life is trivial, however. Cloning is another matter. Ian Wilmut, the embryologist who produced Dolly, the first clone of an adult mammal, says there are "serious safety issues" involved in cloning a human. In his experiments with animals, a quarter of his lambs died within a few days of birth. Ultimately, it took 277 attempts to produce Dolly. "Should we really consider or allow experiments of this...
...Best-Known Clone Embryologist Ian Wilmut made a big splash in the gene pool when he announced that he had cloned a sheep named Dolly. Though animals had been duplicated before, Dolly was the first ever created from an adult cell rather than an embryonic one, raising the specter that a human will one day follow in her hoofsteps...