2. 考研
  3. (46)The prospect of cloning humans has come a step closer as doctors have successfully replicated in human eggs techniques used

(46)The prospect of cloning humans has come a step closer as doctors have successfully replicated in human eggs techniques used

admin2009-04-27  69
问题     (46)The prospect of cloning humans has come a step closer as doctors have successfully replicated in human eggs techniques used to create Dolly the cloned sheep.
    (47)The breakthrough by a team from the New York University Medical Center means that nearly all the scientific work necessary to create genetically identical copies of humans is complete. Only moral and legal questions now prevent scientists from creating clones.
    Dr. Robert Forman, of the Center for Reproductive Medicine in London, said human cloning was" a couple of scientific tweaks" away and could soon take place in a less tightly regulated country outside Europe or the United States.
    (48)Campaigners opposed to embryo research said they are appalled at the pace of work that threatened to create cloned babies before the end of the century possibly in a technologically ambitious country such as China. Doctors could then offer their services to westerners seeking to clone themselves or relatives.
    The New York team, led by Dr. James Grifo, is trying to improve the chances of older women having their own babies. The majority of women aged over 40 suffer chromosome damage in their eggs while the nucleus of the egg is ripening. This is due to weaknesses in the cytoplasmic jelly which nourishes the nucleus before it is fertilized by sperm.
    (49)Grifo, using the nucleus transfer system developed by scientists working on Dolly, has transferred chromosomes from an older woman into a younger woman’s discarded egg which had had its chromosomes removed. Last week Grifo was reported as saying that under American and British law he could not make the next logical move without taking "unethical" steps—such as experimenting on an egg intended for fertilization.
    The next move, said Grifo, would be to fertilize the egg with sperm and turn it into an embryo. (50)Alternatively, he could fuse the nucleus with other genetic material from the mother, such as a patch of skin to complete the DNA building blueprint, and transfer it into an egg chemically primed to grow as if it had been fertilized—as took place with Dolly’s mother. The result would be America’s first human clone.
    Agneta Sutton, of the anti-cloning pressure group CORE, suspects the first human clone has already been born in a private laboratory: "Responsible doctors may have moral qualms but the science is so advanced that no law appears strong enough to stop it. The Boys from Brazil and all those other nightmare sceneries concerning cloned Hilters and other monsters, are about to come true."

选项
答案此外，还可以用来自母体的其他基因物质，比如一块皮肤来与细胞核融合，从而完成DNA的构造蓝图，然后将其转移到一个卵子中。该卵子就像一枚受精卵一样做好了一切生长发育的准备工作—这与多莉母亲的情况是一样的。
解析 译文中采用了分译法，由于原句较长，译成一句汉语则显得过于冗长，故将定语"chemically primed to grow ..."译成了一个独立的句子。此外注意第一个"mother"译作"母体"，而第二个"mother"译作"母亲"；"fertilize"则译作"(使)受精"。
转载请注明原文地址:https://kaotiyun.com/show/4ja4777K
0

考研英语一

相关试题推荐
随机试题
最新回复(0)