克隆

克隆，科学发展的必然产物

1997年克隆羊“多利”的问世证明了单性繁殖的可能性，这是生物学界的重大事件.“克隆”作为一项新生的科学技术手段，它标志着人类科学技术新的发展阶段的到来，它为人类探索生命的奥秘，研究生命的发生、发展的规律提供了一项重要的技术手段，它与人们业已掌握的其他科技手段一样，应予以充分的肯定。换句话说，克隆是科学发展到一定阶段的必然产物。

Sence the first successful experiment in cloning ，this technique has caught attentions of people all over the world，尤其在是否应该克隆人的问题上。因为它同时也带来了许多法律、道德、伦理上的问题。我的回答是肯定的，因为克隆不仅是一项技术，更重要的是它的使用价值。“克隆”是一种科学技术，人类既然能掌握它，就一定有办法控制它，而不会任由其危害人类社会。

在农业科学方面，可快速培育和扩繁抗病力强、生产性能高的优良动物；可以研究动物的发病机理，寻求新的有效治疗药物。人们利用“克隆”技术培育出大量具有抗旱、抗倒伏、抗病虫害的优质高产品种，大大提高了粮食产量。克隆技术对保护物种特别是珍稀、濒危物种来讲是一个福音，具有很大的应用前景。从生物学的角度看，这也是克隆技术最有价值的地方之一。

在当代，医生几乎能在所有人类器官和组织上施行移植手术。但就科学技术而言，器官移植中的排斥反应仍是最为头痛的事。排斥反应的原因是组织不配型导致相容性差。如果把“克隆人”的器官提供给

“原版人”，作器官移植之用，则绝对没有排斥反应之虑，因为二者基因相配，组织也相配。

这对于不孕不育家庭，单亲家庭和同性家庭来说也是个不错的选择。

克隆技术还可用来大量繁殖有价值的基因，例如，在医学方面，人们正是通过“克隆”技术生产出治疗糖尿病的胰岛素、使侏儒症患者重新长高的生长激素和能抗多种病毒感染的干挠素，等名贵药物。

Cloning,the inevitable product of scientific development

The arrival of cloning Dolly in February 1997 proved the possibility of parthenogenesis, which was a major event in the biological sciences. As a new techniques, cloning marks the arrival of a new stage

of development of human science and technology. And it is also an important technique to explore the mysteries of life for humans, study the law of the occurrence and development of life. Like other technological means mastered by people, cloning should be fully affirmed. In other words, cloning is the inevitable outcome of the scientific development to a certain stage.

Sence the first successful experiments in cloning, this technique has caught attentions of people all over the world, Especially in the problem of whether we should clone human beings. Because it also gives rise to a lot of problems in law, morality, ethics and so on. My answer is

affirmative because of the practical value of whole-being

cloning. Humans can use it scientifically and reasonably with their talents, avoiding harming to human society.

In agricultural science, the cloning technology can be used to nurse animals with disease resistance and high performance, and can explore the sick animals for seeking new and effective treatments. Scientists have produced a lot of good quality and high yield varieties with the characteristics of drought-resistant, lodging-resistant, disease-resistant by "cloning " technology, which was greatly improving the food production. Cloning technology is a boon for the protection of species, especially rare and endangered species. From a biological point of view, this is one of the most valuable places of the cloning technology.

In modern times, the doctor can perform transplants in almost all human organs and tissues. But in terms of science and technology, the rejection of organ transplantation is still the hardest tasks. If the transplanted organ comes from a patient's "clone ", there will absolutely be no rejection, because both of them have the same genes and tissue.

It is also a good choice for an infertility family or a single parent. The cloning technology can also be used to producing much more valuable drugs. For instance, in medicine, it produces insulin for treating diabetes, growth hormone for patients with dwarfism and other drugs through the cloning technique.