求一篇有关于克隆的英文作文。字数越多越好。 题目 human cloning 求一篇对于克隆的不同观点及理由的英文文章
\u6c42\u7bc7\u5173\u4e8e\u514b\u9686\u7684\u82f1\u8bed\u4f5c\u6587 150\u8bcd\u5de6\u53f3 \u8001\u5e08\u5c31\u7ed9\u4e86\u4e00\u4e2acloning \u53ef\u80fd\u662f\u56f4\u7ed5\u514b\u9686\u7684\u597d\u574f\u5904\u7b49 \u5bf9\u514b\u9686\u7684\u770b\u6cd5\u7b49Westhusin\uff07s 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 dog\uff07s eggs, the A&M team has produced only a dozen or so embryos (\u80da\u80ce) carrying Missy\uff07s DNA. None have survived the transfer to a surrogate (\u4ee3\u5b55\u7684) mother. The wastage of eggs and the many spontaneously aborted fetuses (\u80ce) may be acceptable when you\uff07re dealing with cats or bulls, he argues, but not with humans. "Cloning is incredibly inefficient, and also dangerous," he says.
\u3000\u3000Even so, dog cloning is a commercial opportunity, with a nice research payoff. Ever since Dolly the sheep was cloned in 1997, Westhusin\uff07s 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 price is right," says Westhusin. Cost is no obstacle for Missy\uff07s mysterious billionaire owner; he\uff07s put up $3.7 million so far to fund A&M\uff07s research.
\u3000\u3000Contrary to some media reports, Missy is not dead. The owner wants a twin to carry on Missy\uff07s fine qualities after she does die. The prototype is, by all accounts, athletic, good-natured and supersmart. Missy\uff07s master does not expect an exact copy of her. He knows her clone may not have her temperament. In a statement of purpose, Missy\uff07s owner and the A&M team say they are "both looking forward to studying the ways that her clones differ from Missy."
\u3000\u3000Besides 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.
\u3000\u3000However, Westhusin is cautious about his work. He knows that even if he gets a dog pregnant, the offspring, should 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 we\uff07re not even close to getting it worked out in animals yet?
My View on Cloning
As we all know,the general public has been debating whether clong is a blessing or a curse.Scientists have made advances in cloning\uff0cwhere they can reproduce a whole animal from a single cell.Some people support cloning,saying it can lead to advances in medicine.Other people oppose cloning,saying it's morally wrong.
Those in favor of this research believe that it could help reproduce endangered and even extinct species all over the wordl.
Personally speaking,I approve of cloning only if it is placed under strict control.On one hand,we should spare no effort to strengthen the management of the clone technology.On the other hand,we should strictly forbid human cloning.Only when we exercise extreme care over this delicate matter can we benefit a great deal from cloning.
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Increased food security for growing populations
If the low success rates can be improved (Dolly was only one success out of 276 tries),reproductive cloning can be used to develop efficient ways to reliably reproduce animals with special qualities.For example,drug-producing animals or animals that have been genetically altered to serve as models for studying human disease could be mass-produced.
Reproductive cloning also could be used to repopulate endangered animals or animals that are difficult to breed.In 2001,the first clone of an endangered wild animal was born,a wild ox called a gaur.The young gaur died from an infection about 48 hours after its birth.In 2001,scientists in Italy reported the successful cloning of a healthy baby mouflon,an endangered wild sheep.The cloned mouflon is living at a wildlife center in Sardinia.Other endangered species that are potential candidates for cloning include the African bongo antelope,the Sumatran tiger,and the giant panda.Cloning extinct animals presents a much greater challenge to scientists because the egg and the surrogate needed to create the cloned embryo would be of a species different from the clone.
Therapeutic cloning technology may some day be used in humans to produce whole organs from single cells or to produce healthy cells that can replace damaged cells in degenerative diseases such as Alzheimer's or Parkinson's.Much work still needs to be done before therapeutic cloning can become a realistic option for the t
绛旓細scientists in Italy reported the successful cloning of a healthy baby mouflon,an endangered wild sheep.The cloned mouflon is living at a wildlife center in Sardinia.Other endangered species that are potential candidates for cloning include the African bongo antelope,the Sumatran tiger,and ...
绛旓細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, ...
绛旓細I also cloned the owl eyes even if the night watch clearly, the thief at night also dare not come.If I would clone I also cloned soon extinct animal and plant them far live, the good life, I want to clone a faithful guardians of environmental protection so that people can'...
绛旓細using hundreds upon hundreds of dog鈥檚 eggs, the A&M team has produced only a dozen or so embryos (鑳氳儙) carrying Missy鈥檚 DNA. None have survived the transfer to a surrogate (浠ｅ瓡鐨) mother. The wastage of eggs and the many spontaneously...
绛旓細There are some rare endangered animal, country has the giant panda, dolphin and so on. Cloning technology can use them? The pair of pandas for cloning problems, has caused controversy among scientists concerned, then, cloning of endangered animal also exist what difficulty? These ...
绛旓細human organs can be cloned, promising to replace old and damaged organs. It seems that humans are on the verge of becoming their own creators, or perhaps a second edition of the gods.Some argue that God always offers answers in one hand and a question mark in the other. "Clo...
绛旓細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 successful.When the cloning technology improves so quickly...
绛旓細people can use clone to copy humen beings. It鈥檚 so horrible for me to know that there is someone the same with me. But in general, clone has more advantages than disadvantages.闅忕潃绉戞妧鐨勮繀閫熷彂灞曪紝鍏嬮殕鏉ュ埌浜嗚繖涓笘鐣屻傚厠闅嗘妧鏈彲浠ュ鍒剁敓鐗╋紝杩欐剰鍛崇潃瀹冨彲浠ヤ负鐢熶骇鍋氳础鐚備汉浠彲浠ヤ粯涓...
绛旓細should rationally face the reality. 浜哄伐鑷劧鐗╋紝浣滀负浜虹被鍩硅偛銆佸姞宸ュ拰鍒堕犵殑瀵硅薄锛屽湪浠ヤ汉涓轰腑蹇冪殑涓栫晫涓崰鎹潃鎰堟潵鎰堥噸瑕佺殑浣嶇疆銆傚畠缁欎汉绫荤殑鐢熸椿甯︽潵浜嗗叏鏂扮殑闈╁懡銆傝屼粖锛屼竴绉嶆柊鍏寸殑鎶鏈斺鍏嬮殕鎵甯︽潵鐨勪汉宸ヨ嚜鐒剁墿鐨勯潻鏂板嵈娣卞埢鍦伴渿鎾肩潃浜虹被鐨勫績鐏典笘鐣屻傚厠闅嗘妧鏈紝浣滀负涓椤瑰綋浠ｇ殑鏂版妧鏈紝浠ュ叾鐗规湁鐨勫惛寮...
绛旓細鍏嬮殕鏄鑻辫鍗曡瘝clone鐨勯煶璇,clone婧愪簬甯岃厞鏂噆lon,鍘熸剰鏄粏鑻楁垨瀚╂灊浠ユ棤鎬х箒娈栨垨鑰呰惀鍏荤箒娈栫殑鏂瑰紡鍩硅偛妞嶇墿,闅忕潃鏃堕棿鐨勬帹绉,鍏嬮殕鐨鍐呮兜宸茬粡鎵╁ぇ浜,鍙鏄敱1涓粏鑳炶幏寰2涓互涓婄殑缁嗚優,缁嗚優缇ゆ垨鐢熺墿浣,鐢变竴涓翰鏈簭鍒椾骇鐢熺殑DNA鐨勫簭鍒,灏辨槸鍏嬮殕.鍏嬮殕灏卞涓鎶婂弻鍒冨墤.姣忓綋鏄ユ殩鑺卞紑鐨勬椂鍊,鍠滄寮勮崏鐨勪汉渚夸細鍋...
