高二英语作文克隆
克隆是指生物体通过体细胞进行的无性繁殖,以及由无性繁殖形成的基因型完全相同的后代个体组成的种群。下面小编给大家分享高二英语作文克隆内容，希望能够帮助大家!
高二英语作文克隆1
today’s technology develops so quickly that many impossible things become 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 complete genetic material of a regular body cell. different from the common propagate, cloning need only one cell and without sex. in 1997, 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, many scientists 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 cloning technology we can change the gene’s dna order, so we can save lots of people. but cloning still has some problems. the scientists found that the cloning animal’s gene has a little different from the original animal. so the life will shorter than the real life. the fact proved that, the cloning sheep dolly has died. it only has the half life of the common 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. if 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 against human cloning in canada, denmark, england, norway, spain, and the uk. even in the usa, the government doesn’t 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 accepted, how to look upon this technique, first 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.
高二英语作文克隆2
westhusin’s 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’s eggs, the a&m team has produced only a dozen or so embryos (胚胎) carrying missy’s 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 acceptable when you’re dealing with cats or bulls, he argues, but not with humans. "cloning is incredibly inefficient, and also dangerous," he says.
even so, dog cloning is a commercial opportunity, with a nice research payoff. ever since dolly the sheep was cloned in 1997, westhusin’s 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’s mysterious billionaire owner; he’s put up $3.7 million so far to fund a&m’s research.
contrary to some media reports, missy is not dead. the owner wants a twin to carry on missy’s fine qualities after she does die. the prototype is, by all accounts, athletic, good-natured and supersmart. missy’s master does not expect an exact copy of her. he knows her clone may not have her temperament. in a statement of purpose, missy’s owner and the a&m team say they are "both looking forward to studying the ways that her clones differ from missy."
besides 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, 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’re not even close to getting it worked out in animals yet?
高二英语作文克隆3
Every Saturday, Sunday my extracurricular class and school homework is very much, I can't play, can not sleep, watching TV, feel so tired so tired!
I think every day, if someone can help me! Help me pack my school bag class, do homework, take notes, and so on, then I know the more relaxed and happy. One day, I was writing my homework, suddenly appeared A 10 "human cloning", A, said: "your dream we all know, now you give us the task?" I can be happy is broken. A, I said: "you'll finish English homework now. B you finish writing Chinese homework now. C # you finish writing math homework now. # D you get English now schoolbag... J you clean my room. Now you start to complete my task now." I a took my documents began to look at it, and to watch TV for a while, then sleep... I am very happy, I had a very happy.
You also want to have such a "clone"? As I am carefree happy to spend every day?
高二英语作文克隆4
You can read the word "cloning" quite often in the newspaper. I find it very interesting. It seems like a fairy story.With cloning you will be copied. Today, scientists can clone some large animals. Doctors are in the process of cloning humans though it is not allowed in most of the countries.
Cloning brings a lot of questions. If someone can come to the world with only one parent, will he or she be happy? My grandmother died a few years ago. I miss her very much. If she can be cloned into a new one, I'll be very happy but confused.What shall I call her after she comes into the world? Because"she -- my grandmother" is younger than I.
高二英语作文克隆5
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.
clone, to a certain degree, is beneficial to mankind.such disease as parkinsons will possiblly be cured in the future in the hope of further applying of clone.however,the abuse of this technology will bring human being unthinkable destruction.
since the declaration of the death of dolly,we are more conscious of the inefficient procedure of clone.acorrding to "dolly's false legacy",the incidence of death among fetuses and offspring produced by cloning is much higher than it is through natural reproduction--roughly 10 times as high as normal before birth and 3 times as high after birth.and even you may argue that this technology will be perfected in the future, i don't see there is any point in whole--being cloning.
many people consider this technology a promising one as to bring all human being to a new era in which all human reproduction will be accomplished by cloning.thus scientists in some countries have already started their great plan to clone human.but let's think, what is the practical value in doing so?you may tell me that it can bring hope for those couples unable to have children because they might choose to have a copy of one of them rather than accept the gene intrusion from a doner.but imagine,if you have a child owning the same apperance as yours or your husband's, will you accept it without any uncomfort?
don't you think it is embarrassing?or if this kind of human reproduction is allowed,terrorists may get hold of it and reproduce lots of "american presidents".don't you agree that these presidents might bring the world much more chaoes?besides these terrible aspects,the cloning of whole--being may destroy the diversity of people of the globe.
of course, there still remains much more disadvantages of the application of cloning reproduction of human being and animals. we should be extremely cautious of what we do and thus remember we will sure be respondible for all the results created by ourselves!!!
so how do u think about it?
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