※ [本文转录自 Zyca 信箱] 作者: [email protected] 标题: CNN今日头条 时间: Sat Jan 15 12:51:37 2000 发信人: [email protected] (祝蛋糕好梦), 看板: NTUEE 标 题: CNN今日头条 发信站: 台大电机 Maxwell BBS (Fri Jan 14 08:59:00 2000) 转信站: SimFarm!bbs.ee.ntu!Maxwell [CNN今日头条] [adopted from www.cnn.com] ------------------------------------------------------------------ Oregon researchers say they have cloned a monkey by splitting an early-stage embryo and implanting the pieces into mother animals. The technique, detailed in Friday's issue of the journal Science, has so far produced only one living monkey, a bright-eyed rhesus macaque female named Tetra, now 4 months old. Professor Gerald Schatten, a researcher at the Oregon Health Sciences University in Portland who led the research, said four more animals are on the way. "This is essentially the method of Brave New World," said Ronald M. Green, an ethicist at Dartmouth College. "This opens the prospect of mass identical replication." Schatten said the team's goal was to produce identical monkeys that could be used to perfect new therapies for human disease. --this is how they did it-- 1. An egg from a mother and sperm from a father are used to create a fertilized egg. 2. After the embryo grows into eight cells, researchers split it into four identical embryos, each consisting of just two cells. 3. The four embryos are then implanted into surrogate mothers. Schatten said that in effect, a single embryo becomes four embryos, all genetically identical. "It is possible that we will have genetically identical monkeys born to different mothers," he said. Schatten says the "embryo splitting" process is similar to what happens in nature when a mother has twins. "This is just artificial twinning," he said. The method is commonly used in animals such as cattle but had never before been used to create a monkey. ---------------------------------------------------------------------- -- 任何意见，都欢迎讨论喔﹗﹗﹗﹗ -- ※ Origin: 台大电机 Maxwell 站 ◆ From: caliente.g1.ntu.edu.tw --

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