Word: clonings
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Since Korean scientist Hwang Woo-suk fell from grace last year over his now-discredited work on human cloning, he has been stripped of his position at Seoul National University and currently faces trial on charges of embezzling hundreds of thousands of dollars from the donors who sponsored his work. At last week's hearing, Hwang explained that while some of the cash may have found its way into extracurricular projects, "all of the money was used for the purpose of research." Besides paying for one scientist's wedding and another's housing, that research agenda apparently included attempts...
...phone is not a RAZR clone. It's just as slim and, like the hot Samsung a900 Blade for Sprint, it owes much of its appeal to Motorola's revolutionary handset. But a clone is an imitation, often a pale one. My instinct is that what Motorola started with the RAZR, other companies mean to finish. The CU500 - the first phone to tap into Cingular's new "High-Speed Downlink Packet Access" (HSDPA) network - is next in a stream of upcoming slim and powerful cell phones...
...still surprised that cloning works," says Ian Wilmut, the embryologist who led the team that created Dolly. Ten years and 15 mammalian species later, the efficiency of the process is no better than it was at Dolly's birth: only 2% to 5% of the eggs that start out as clones end up as live animals. For each clone born, hundreds of others never make it past their first days and weeks, the victims of defects in development too severe to allow them to survive...
...good news, as far as cloning's future is concerned, is that those problems seem to be limited to the clones and are not passed on to the next generation. When clones mate with ordinary animals, their offspring are created by the natural merging of egg and sperm--not by the reprogramming of a mature cell--which may erase any reprogramming errors in the clone. The proof is that Dolly gave birth to five healthy lambs. Cloned cows, pigs and mice are also bearing normal offspring. But when clones mate with other clones, all bets are off. Mice created this...
...developed at an early age. The other was shortened telomeres in her cells. Telomeres are bits of DNA that sit at the ends of chromosomes and serve as a biological clock chronicling a cell's age. In general, the shorter the telomeres, the older the cell. Dolly, a clone of a 6-year-old ewe, had cells whose telomeres were closer in length to those of her biological mother than to those of a baby lamb. We will never know, though, whether her shortened telomeres would have shortened her life. In 2003 Wilmut and his team decided to put Dolly...