Book8_Unit_2_Cloning-Reading[原创].ppt

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1、 Unit 2 cloning Which ones are natural clones?Which ones are man-made? How do they differ.Warming upA strawberry plantGrowing new plantsNatural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that produced through human intervention(介入介入) .Dolly the sh

2、eepShe was cloned while the others were born naturally. In other word, Dolly was a _ sheep.clonedHow does Dolly differ from other sheep?Skim the following passage and match the paragraph with the correct sentence.Para 1 A. The problems of DollyPara 2 B. The two major uses of cloningPara 3 C. The att

3、itudes towards cloningPara 4 D. The definition of cloningPara 5 E. The effect of cloning in society1. The main idea of the text is_ A. animal cloning is very valuable and can benefit the world. B. animal cloning could be misused by bad people so it must be forbidden C. animal cloning is well develop

4、ed because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its future.main idea2.Dolly the sheep_. A. looked exactly like the sheep that provides the egg. B. was the exact copy of the sheep that provides the nucleus. C. looked like the sheep that gave b

5、irth to it. D. had the characteristics of all three sheep. 3. It can be inferred from the passage that a cloned animal_. A. usually lives as long as the original one B. usually lives longer than the original one C. usually lives shorter than the original one D. is usually as healthy as the original

6、one4. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 135. Which of the following is not an advantage 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 e

7、xtinct.D. Famous persons who have passed away can be cloned.6. In the second paragraph, the word “straightforward” means _.A. uncomplicated B. honest C. frank D.difficult7. We can infer from the last three paragraphs that _.A. The normal development of Dolly had no effect on the cloning of other spe

8、cies.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 about the future of cloning.Para 4& 5The impact and peoples reaction to cloning

9、 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)8.The writers attitude towards cloningBecause_At first, the fact that Dolly developed _ in a natural way was _.Later, the news _she lived for six years, ha

10、lf 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 original one.Para 3The problems of Dollynormallyencouragingorginalthatdisturbingshorterread freely1. The fact that she seemed to develop normally was very encour

11、aging.2. Then came the disturbing news that Dolly had become seriously ill. Appositive clauseFill in the blanks:para.4and5( (课文再回首课文再回首） On the other hand, Dollys appearance raised a storm of_1_and had a great 2_ on the media and public imagination. It became controversial. Newspapers wrote of evil

12、leaders hoping to clone themselves to 3_ their ambitions. Besides, religious leaders also raised 4_ questions. So governments became nervous and more 5_. Some even 6 _ research into human beings but other countries like China and the UK continued to 7_ evidence of clones medical aid. However, scient

13、ists still wonder whether cloning will help or harm us and where it is leading us.objectionsimpactattainmoralconservativeforbadeaccumulateCloning 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 _.plantsanima

14、lsthemselveshumansNatural cloneMan-made clonePara 1 listen and fill the blanksIntensive Reading 1.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 t

15、heir determination and patience that paid off. The major uses and breakthrough of cloning 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

16、humans. developthe illnessesproduce curesillnessesAnimal clones may _ _ than the donor 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 plants

17、qualityforsaleEvil leaderusefulnew plant species moral objectionsendangered animalsPractice: Retell the procedure of cloning Dolly the sheep? 克隆羊诞生图示克隆羊诞生图示 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 diffic

18、ulty for all cloned animals?”3. It suddenly opened everybodys eyes to the possibility 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 h

19、oping to clone themselves to attain their ambitions. understand the sentences :Predicative clauseAttributive clausePractice 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 y

20、our group work to the whole class:Questions:1. Do you support the idea of producing human embryos(胚胎)for medical purposes?Why?2. Do you think it a good idea to use cloned humans for organ(器官)transplants? Why?3. Do you think a cloned human should have human rights? Why?Homework1. 创新作业本创新作业本 period I2

21、. Finish Ex.1,2,3, Page12.我国成功繁殖克隆兔我国成功繁殖克隆兔 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。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“母母亲兼姐姐亲兼姐姐”2002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)A strawberry plantThe new plants that grow from the runners are exact copies of the original plant.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.TwinsTwinsThey are born naturally and identical in sex and appearance.