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1、关于克隆英语作文 克隆有利也有弊，克隆指的是无性繁殖，那么对于克隆你了解多少呢?以下让我们一起来分享关于克隆的英语作文吧! Westhusins experience with cloning animals leaves him upset by all this talk of human cloning. In three years of work on the Missy project, using hundreds upon hundreds of dogs eggs, the A&M team has produced only a dozen or so embryos (胚
2、胎) carrying Missys DNA. None have survived the transfer to a surrogate (代孕的) mother. The wastage of eggs and the many spontaneously aborted fetuses (胎) may be aeptable when youre dealing with cats or bulls, he argues, but not with humans. Cloning is incredibly inefficient, and also dangerous, he say
3、s. Even so, dog cloning is a mercial opportunity, with a nice research payoff. Ever since Dolly the sheep was cloned in 1997, Westhusins phone has been ringing with people calling in hopes of duplicating their cats and dogs, cattle and horses. A lot of people want to clone pets, especially if the pr
4、ice is right, says Westhusin. Cost is no obstacle for Missys mysterious billionaire owner; hes put up $3.7 million so far to fund A&Ms research. Contrary to some media reports, Missy is not dead. The owner wants a twin to carry on Missys fine qualities after she does die. The prototype is, by all ao
5、unts, athletic, good-natured and supersmart. Missys master does not expect an exact copy of her. He knows her clone may not have her temperament. In a statement of purpose, Missys owner and the A&M team say they are both looking forward to studying the ways that her clones differ from Missy. Besides
6、 cloning a great dog, the project may contribute insight into the old question of nature vs. nurture. It could also lead to the cloning of special rescue dogs and many endangered animals. However, Westhusin is cautious about his work. He knows that even if he gets a dog pregnant, the offspring, shou
7、ld they survive, will face the problems shown at birth by other cloned animals: abnormalities like immature lungs and heart and weight problems Why would you ever want to clone humans, Westhusin asks, when were not even close to getting it worked out in animals yet? Todays technology develops so qui
8、ckly that many impossible things bee true; the cloning technology is the example. What is cloning? Cloning is a process used to create an exact copy of a mammal by using the plete geic material of a regular body cell. Different from the mon propagate, cloning need only one cell and without sex. In 1
9、997, the great news shocked the whole world that the British scientists created a lamp named Dolly from a single cell, miraculously; the cell had been taken from the udder of adult sheep, which show the first cloning experiment was suessful. When the cloning technology improves so quickly, many scie
10、ntists and doctors have different opinions, someone think it is good but someone think it is bad. Cloning can bring many benefits to the human, such as rejuvenation, helpful for Defective genes, Liver failure, Kidney failure and Leukemia. These disease are very different to cure, if we use the cloni
11、ng technology we can change the Genes DNA order, so we can save lots of people. But cloning still has some problems. The scientists found that the cloning animals Gene has a little different from the original animal. So the life will shorter than the real life. The fact proved that, the cloning shee
12、p Dolly has died. It only has the half life of the mon sheep.In my own opinion I agree to clone the endangered animal and disagree with cloning human. Because I think the cloning technology should be respected. It really can bring us many benefits; further more it can develop the science of human. I
13、f clone the human, there will, however, be many problems, the population is the biggest problem. May be some people will use the cloning people to start the war. So I am against cloning human. Also many countries disagree to clone people. The government makes the laws about cloning. There are laws a
14、gainst human cloning in Canada, Denmark, England, Norway, Spain, and the UK. Even in the USA, the government doesnt allow to clone human. (Because in USA, the human right is higher than everything) In the end, I think cloning is new technology, it should be aepted, how to look upon this technique, f
15、irst we should know the advantages and disadvantages, then we should know the effect of cloning for human and the animal, third we will take the action: To advocate the animal cloning but be against with the human cloning. To clone or not to clone, is that the question? Advanced technology has already pushed human being to edges,such as the production of weapons of mass destruction,the destruction of Ozone by Freon ,and the application of clone.The heated deabte over whether cloning technique should be used in human reproduction must be considered as a serious issue.
