"Successful cloning of an increasing number of species confirms the general impression that it would be possible to clone any ma

admin2016-11-30  30

问题 "Successful cloning of an increasing number of species confirms the general impression that it would be possible to clone any mammalian species, including humans," said Ian Wilmut, a reproductive biologist at the University of Edinburgh who produced the first cloned mammal, Dolly the sheep, from an adult cell nearly a decade ago. Researchers have since cloned cats, goats, cows, mice, pigs, rabbits, horses, deer, mules and gaur, a large wild ox of Southeast Asia. So far, efforts to clone a monkey or another primate with the same techniques have failed. Uncertainties about the health and life span of cloned animals persist: Dolly died prematurely in 2003 after developing cancer and arthritis.

选项

答案爱丁堡大学生殖生物学家伊恩·维尔莫特称:“越来越多的物种被成功克隆使人们确信:所有哺乳动物,包括人类本身,都是可能被克隆的。”维尔莫特是第一个克隆哺乳动物的科学家,大约10年前他成功利用成体细胞克隆了绵羊多莉。此后研究人员相继克隆了猫、山羊、牛、老鼠、猪、免予、马、鹿、骡及白肢野牛(东南亚地区一种大野牛)。但迄今为止,用同样方法克隆猴子或其他灵长类动物的尝试均告失败。克隆动物的健康状况及寿命也仍然存在不确定性:绵羊多莉2003年就因患癌症及关节炎夭亡。

解析
转载请注明原文地址:https://kaotiyun.com/show/S5yK777K
0

随机试题
最新回复(0)