克隆人虽然许多科学家都不相信，一个实实在在的克隆人会立即问世，但克隆技术的突飞猛进却有目共睹。自从1997年克隆羊“多利”诞生以来，全世界已有

游客2025-02-03 12

问题克隆人
虽然许多科学家都不相信，一个实实在在的克隆人会立即问世，但克隆技术的突飞猛进却有目共睹。自从1997年克隆羊“多利”诞生以来，全世界已有很多国家立法禁止克隆人。但科学家在人类胚胎、干细胞克隆技术的研究方面却取得了很多新进展。无论是公开还是秘密“研制”克隆人的工作也根本就没有停止过。克隆技术之所以会迅速发展，首先是因为它有需求。以干细胞为例，它既是胚胎的主要构造，又是克隆技术的基础。科学家们相信，他们最终可以从干细胞中制造皮肤、内脏、骨头或者大脑细胞等多种人类细胞，并通过控制胚胎干细胞的分化过程，制造出不同的细胞，取代许多病人坏死的细胞，达到医治多种疾病的目的。如果科学家们运用克隆技术能够克隆出心脏、肝脏甚至神经细胞等，那就意味着医疗技术的一场革命。

选项

答案 Human Cloning
Though many scientists do not believe that a human clone will really come into being soon, rapid progress in cloning techniques is evident.
Since the birth in 1997 of Dolly, the cloned sheep , many countries have passed laws that prohibit human cloning.
Nevertheless, scientists have made headway in the research on/ into the cloning of human embryos and stem cells.
Human cloning research, whether in public or in secret, has never stopped.
The swift advances in cloning technology are due to the demand.
Take stem cells for example. They are not only the main constituents of the embryo, but also the foundation of cloning technology.
Scientists believe they will eventually know how to duplicate many kinds of human cells like cells of the skin, organs, spine or even brains out of stem cells. In time they will, by controlling the division of embryo stem cells, be able to replace a patient’s dead cells and cure diseases.
If scientists can use cloning technology to make a heart, a liver or even neural cells, that means they have unleashed a revolution in medicine.

解析

转载请注明原文地址:https://www.tihaiku.com/zcyy/3941231.html

相关试题推荐

随机试题

最新回复(0)

克隆人虽然许多科学家都不相信，一个实实在在的克隆人会立即问世，但克隆技术的突飞猛进却有目共睹。自从1997年克隆羊“多利”诞生以来，全世界已有

转基因生物转基因动植物是遗传工程实验的产物，在这个实验中，一个生物体的基因物质被移入另一生物体，因而受体就能显示出新的特征。商界、科学家和农民