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1、 Unit 2 cloning 12Which ones are natural clones?Which ones are man-made? How do they differ.Warming up3A strawberry plant4Growing new plantsman-made cloneman-made clone5Natural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that produced through human
2、 intervention(介入介入) .6Dolly the sheepShe was cloned while the others were born naturally. In other word, Dolly was a _ sheep.clonedHow does Dolly differ from other sheep?man-made cloneman-made clone7Pre-reading add your questions to the listQuestion list about cloning 1. What is a clone?2. How is a
3、clone produced ?3. What benefits can humans gain from cloning?4.What problems may arise when humans are cloned? 5. 6. 8CLONING: WHERE IS IT LEADING US?Predict: To which question from our list the answer might be found in this passage? 9Fast reading3 mins 2. Outline key word for each paragraphPara. 1
4、 _Para. 2 _Para. 3 _Para. 4 _Para. 5 _Readfor1.Main idea of the passage Introduction/ definitionUses and breakthroughProblems of Dolly the Impact of cloningPeoples reaction to cloning101.The main idea of the text is_ A. animal cloning is very valuable and can benefit the world. B. animal cloning cou
5、ld be misused by bad people so it must be forbidden C. animal cloning is well developed because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its future.main idea111.Dolly the sheep_. A. looked exactly like the sheep that provides the egg. B. was the
6、exact copy of the sheep that provides the nucleus. C. looked like the sheep that gave birth to it. D. had the characteristics of all three sheep. Reading II Skimming ( 5ms )Choose the right answer according to the text.122. It can be inferred from the passage that a cloned animal_. A. usually lives
7、as long as the original one B. usually lives longer than the original one C. usually lives longer than the original one D. is usually as healthy as the original one3. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 12134. Which of the following is not an advant
8、age of cloning?A.Cloning can be used for medical purposes. B.Large quantities of food can be produced by cloning.C.Cloning can help keep animals from becoming extinct.D.Famous persons who have passed away can be cloned.5. In the second paragraph, the word “straightforward” means _.A. uncomplicated B
9、. honest C. frank D.difficult146. Which of the follow is NOT a problem or danger of cloning according to the text?A.Cloned Bin Ladens would do harm to the world.B. Animal clones may develop the illness of older animals and may die younger than the donor animals.C. There are moral objections to cloni
10、ng human beings.D. Too much cloning may lead to the destruction of the balance of nature.15Cloning is a way of making an exact copy of another animal and plant.What is cloning ?Cloning happens both in _ and in_. They can be cloned by _ and _.plantsanimalsthemselveshumansNatural cloneMan-made clonePa
11、ra 1 listen and fill the blanksIntensive Reading 161.How many major uses do cloning have? Firstly, commercial Secondly, research2. When was the cloning of Dolly the sheep born? Why did the scientists succeed in cloning it?Para 2Read together1996. It was their determination and patience that paid off
12、. The major uses and breakthrough of cloning17At first, the fact that Dolly developed _ in a natural way was _.Later, the news _she lived for six years, half the length of the life of the _ one was _.Finally, the problem that occurred to the scientists was that a cloned animal lives_ than the origin
13、al one.Para 3The problems of Dollynormallyencouragingorginalthatdisturbingshorterread freely1. The fact that she seemed to develop normally was very encouraging.2. Then came the disturbing news that Dolly had become seriously ill. Appositive clause18 We can infer from the last three paragraphs that
14、_.A. The normal development of Dolly had no effect on the cloning of other species.B. Dollys serious disease and final death disturbed the whole world.C. Dolly successfully cloned a new lamb with the help of cloning scientists.D. There were arguments about animals about animal cloning and concerns a
15、bout the future of cloning.Para 4& 5The impact and peoples reaction to cloning19 the author does not state any personal opinion about cloning. A. Objective (be fair) B. Negative (be against it) C. Positive (be in favor of it)The writers attitude towards cloningBecause_20 Detail reading and discussio
16、n Detail reading and discussion Fill in the chart using the information from the text.Problems or dangers of cloningAdvantages of cloningAnimals may_ _ of older animals.Medical cloning could _ _ for serious _ in humans. developthe illnessesproduce curesillnesses21Animal clones may _ _ than the donor
17、 animalsCloning plants can _ _ of similar _ _ _._ _ may want to clone themselves.Cloning plants can be _ for research on _ .There are _ _ to cloning human beings.Cloning can help save _ _ .die youngerproduce plantsqualityforsaleEvil leaderusefulnew plant species moral objectionsendangered animals22P
18、ractice: Retell the procedure of cloning Dolly the sheep? 23克克隆隆羊羊诞诞生生图图示示2425 1. The fact is that they are both examples of natural clones.2. The questions that concerned all scientists were: “Would this be a major difficulty for all cloned animals?”3. It suddenly opened everybodys eyes to the poss
19、ibility of using cloning to cure serious illnesses, and even producing human beings.4. Although at present human egg cells and embryos needed for cloning research are difficult to obtain, newspapers wrote of evil leaders hoping to clone themselves to attain their ambitions. understand the sentences
20、:Predicative clauseAttributive clause26Practice discussion ( 8ms )Practice discussion ( 8ms ) Choose one of the following questions to discuss in groups. The leader of each group should write down every members opinion, then the volunteers will show your group work to the whole class:27Questions:1.D
21、o you support the idea of producing human embryos(胚胎胚胎)for medical purposes?Why?2.Do you think it a good idea to use cloned humans for organ(器官器官)transplants? Why?3.Do you think a cloned human should have human rights? Why?28Homework1. 创新作业本创新作业本 period I2. Finish Ex.1,2,3, Page12.29我国成功繁殖克隆兔我国成功繁殖克
22、隆兔 体形要比普通兔大许多体形要比普通兔大许多2002年年5月月中旬成功地中旬成功地繁殖了一只繁殖了一只胚胎细胞克胚胎细胞克隆兔。隆兔。30第一只克隆宠物猫第一只克隆宠物猫克隆马及其克隆马及其“母亲母亲兼姐姐兼姐姐”312002年年4月十六月十六日美国第一头日美国第一头克隆牛克隆牛“艾米艾米”产下牛犊喜作产下牛犊喜作妈咪妈咪32克隆的荧光小猪克隆的荧光小猪(左左)和正常小猪和正常小猪(右右)33A strawberry plantA strawberry plantThe new plants that grow from the runners are exact copies of the original plant.34富贵竹插枝即活富贵竹插枝即活Lucky bamboo The gardener should cut the plant ,then the cutting produce another new plant.35TwinsTwinsThey are born naturally and identical in sex and appearance.36
