英语克隆作文.doc

To benefit human cloning 治疗性克隆就是从克隆胚胎中可以提取到与病人遗传基因完全相同的全能型胚胎干细胞，用它衍生而来的全新的功能细胞、组织或器官，来取代病变的细胞、组织、器官，从根本上解决组织器官移植中配型困难与供体不足等瓶颈问题。1 克隆技术与遗传育种 在农业方面，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。在这方面我国已迈入世界最先进的前列。 2 克隆技术与濒危生物保护 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。 3 克隆技术与医学 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。问题是，利用“克隆人”作为器官供体合不合乎人道？是否合法？经济是否合算？ 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，等等。Therapeutic cloning is from cloned embryos can extract to patients with genetic identical allround embryonic stem cells, and use it derived from the function of the new cell, tissue or organ, to replace the lesion cells, tissues and organs from the fundamental solution to organization organ transplant matches in difficulties and donor shortage the bottleneck problem, etc. 1. Cloning and genetic breeding In agriculture, people use cloning technology has developed a drought resistance, resistance to diseases, insects lodging quality high yielding varieties, greatly improving the food production. In this respect our country has entered the world most advanced front row. 2. Cloning technology and endangered species protection Cloning technology to protect species of rare and endangered species especially will be a Gospel, with a great application prospect. From a biological perspective, this is also where the value of cloning technology is one of the most. 3. Cloning technology and medicine At present, the doctor can almost in all human organs and organization of transplant. But for science and technology, the organ transplant rejection is still the most headaches. Rejection is the cause of the organization to poor heart patient compatibility. If the clone organ to provide original, for the use of organ transplantation, is absolutely not the concentrations of rejection, because the two genetic match, organization also match. The problem is, use clone as donors and unsuited to humanity? Is it legal? Economy is cost-effective? Cloning technology can also be used to multiply valuable genes, for example, in medicine, people it is through cloning technology to produce insulin therapy for diabetes, that pygmyism patients to the high growth hormone and resistant to a variety of virus infection dry flexible element, and so on. Advantages of cloning 克隆技术是一项伟大的发明，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，为不断增长的人口提供了充足的粮食。只要提取某个动物身上小小的细胞，就能克隆出一个与他一模一样的动物来，这样做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，这也是克隆技术最有价值的地方之一，如果利用好克隆技术， 我们再也不用担心那些濒危动物会消失，甚至已经消失的动物，只要有它的标本，一片羽毛、一张毛皮就可以克隆出这个动物。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。器官移植中的排斥反应仍是最为头痛的事，哪怕是有血缘关系的亲属之间，也会有这种反应，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，大大延长了人类的寿命。除此之外，克隆动物对于研究癌生物学、研究免疫学、研究人的寿命等都具有不可低估的作用。不可否认，克隆绵羊的问世也引起了许多人对克隆人的兴趣，例如，有人在考虑，是否可用自己的细胞克隆成一个胚胎，在其成形前就冰冻起来。在将来的某一天，自身的某个器官出了问题时，就可从胚胎中取出这个器官进行培养，然后替换自己病变的器官，这也就是用克隆法为人类自身提供配件 。神奇的克隆技术在 我们生活中无处不在，这项技术正向人类展示它诱人的前景。cloning technology is an invention, people using cloning produced a lot with drought resistance, resistance to diseases, insects lodging quality high yielding varieties, greatly improving the food production, for increasing population provide enough food. As long as a little cells extracted from animals, you can clone a and he exactly like animals, like to do to protect species of rare and endangered species especially will be a Gospel, with a great application, this is also where the value of cloning technology is one of the most, if use the cloning technology, we no longer need not worry about the endangered animals will disappear, and even the animals have disappeared, as long as there is its specimens, a feather, a fur can cloned this animal. At present, the doctor can almost in all human organs and organization of transplant. The organ transplant rejection is still the most headaches, even if be a blood relationship between relatives, will also have a reaction, if the clone organ to provide original, for the use of organ transplantation, is absolutely not the concentrations of rejection, greatly extend the human life. In addition, cloned animals for research cancer biology, study the study of human life, immunology has not underestimate role. Undeniable, clone sheep the appearance of the they have also caused many people to clone interest, for example, someone in the consideration, will be available to their cells cloned into an embryo, in its before forming and freeze. In one day the future of their own a certain organ out of the question, can take out the organs from embryos to cu