2. 职称英语
  3. "Successful cloning of an increasing number of species confirms the general impr

"Successful cloning of an increasing number of species confirms the general impr

游客2024-08-07  50
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:http://tihaiku.com/zcyy/3708959.html
相关试题推荐
随机试题
最新回复(0)