最新Cloning Where is it Leading us(共53张PPT课件).pptx

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1、Reading第一页，共五十三页。Reading Where is it leading us?Where is it leading us?Book 8 unit 2第二页，共五十三页。 is one that occurs in a natural form of cloning without human help. is one that is produced through human intervention(介入介入(jir) .Warming upTwo kinds of clones:Natural cloneMan-made clone第三页，共五十三页。In pairs

2、, look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ.discussion第四页，共五十三页。A strawberry plantThe new plants that grow from the runners are exact copies of the original plant.第五页，共五十三页。一株草莓一株草莓(comi)依靠它沿地依靠它沿地“爬走爬走”的匍匐的匍匐茎茎,一年内就能长出数百株草莓

3、一年内就能长出数百株草莓(comi)苗苗A strawberry plantThe plant produces its own runners.第六页，共五十三页。Growing new plantsA stem Take from growing plants to make new ones. 第七页，共五十三页。富贵竹插枝富贵竹插枝(ch zh)即即活活 The gardener cuts the plant ,and then the cutting produces another new plant.第八页，共五十三页。富贵竹插枝富贵竹插枝(ch zh)即活即活仙人掌每块落地仙人

4、掌每块落地(lu d)就生就生根根第九页，共五十三页。TwinsThey are born naturally and identical in sex and appearance.第十页，共五十三页。Dolly是世界上第一是世界上第一例用体细胞例用体细胞乳腺乳腺上皮细胞上皮细胞,通过细胞通过细胞核移植技术核移植技术,在复杂在复杂的人工的人工(rngng)操作下操作下,得到的一只小绵羊得到的一只小绵羊 。第十一页，共五十三页。She was cloned while the others were born naturally.Dolly was a _ sheep.clonedHow do

5、es Dolly differ from other sheep?In 1996, a sheep called Dolly was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning.第十二页，共五十三页。 The following are some photos about cloning. See how much you know about it.第十三页，共五十三页。2001 cloning catt

6、le2003 Cloning horse20022002cloning rabbitscloning rabbits2002 cloning cats第十四页，共五十三页。2005 cloning dogs克隆克隆(k ln)的荧光小猪的荧光小猪(左左)和和正常小猪正常小猪(右右)第十五页，共五十三页。In pairs discuss what you understand about cloning. Then list the questions you want to find out. Share your lists with one another.Pre-reading第十六页，

7、共五十三页。Questions about cloning1. What is a clone?A clone is group of cells or organisms that are genetically identical and have been produced asexually (无性生殖无性生殖(wxng shngzh) /繁繁殖殖) from the same original cell. They include natural and man-made clones.第十七页，共五十三页。 Clone, also called reproduce asexuall

8、y (无性生殖无性生殖(wxng shngzh) /繁殖繁殖), is the creation of cells or whole animals using DNA from a single “parent”, without using the normal reproductive (有性生殖有性生殖) process. The clone has the exactly same DNA to the parent. It includes natural and man-made clone.第十八页，共五十三页。2. How is a clone produced?The cl

9、oning of plants is simple and relatively easy. It can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). The cloning of animals is more complicated. It was not achieved until 1996 and is fully explained in the first reading.第十九页，共五十三页。3. Wha

10、t benefits can humans gain from cloning?1) Medical cloning can help cure serious illnesses that ruin ones quality of life (such as Parkinsons disease帕帕金森症金森症 or Alzheimers disease老年老年痴呆症痴呆症).2) It can help infertile people have babies.第二十页，共五十三页。4. What problems may arise when humans are cloned?1) P

11、eople may want to clone themselves so they can live forever.2) People may want to clone dead children.3) People may want to clone their favorite pets.第二十一页，共五十三页。Skimming Please read the passage quickly and get the main idea, and then finish the following exercises in groups. 第二十二页，共五十三页。1.The main

12、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 developed because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its f

13、uture.主旨主旨(zhzh)大意大意第二十三页，共五十三页。2. The cloning of Dolly the sheep succeeded because_. A. its easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience C. the scientists were rewarded and got lots of money D. many other attempts to clone mammals failed

14、B细枝末节细枝末节(x zh m ji)第二十四页，共五十三页。3. What is peoples fear about human cloning. Which of the following is wrong?A. Cloned Hitlers would do harm to the world.B. Cloned people may be killed at will for medical aid.C. A woman would have difficulty recognizing her real husband.D. Men will die out because a

15、 woman can give birth to a baby without a husband.第二十五页，共五十三页。4. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 13推理推理(tul)判断判断第二十六页，共五十三页。5. We can infer from the last three paragraphs that _.A. The normal development of Dolly had no effect on the cloning of

16、other species.B. Dollys serious disease and final death disturbed the whole world.C. There were arguments about animal cloning and concerns about the future of cloning.D. Dolly successfully cloned a new lamb with the help of cloning scientists.第二十七页，共五十三页。Reading Listen to the tape and find out the

17、main idea of each paragraph.第二十八页，共五十三页。The main idea of each paragraph. a way of making an exact copy of another animal and plant.problemstwo majoreffect1.Cloning is _2.Cloning has _ uses.3.The _ of Dolly.4. The _ of Dolly.5. Peoples to cloning.reaction第二十九页，共五十三页。Cloning is a way of making an exac

18、t copy of another animal and plant.What is cloning ?It happens both in _ and in_. They can be cloned by _ and _.plantsanimalsthemselveshumansNatural cloneMan-made clonePara 1 The definition of cloning第三十页，共五十三页。 Firstly, commercial Secondly, researchPara 2The major uses and procedures of cloningIn t

19、his paragraph, the word “straightforward” means _.A. uncomplicated B. honest C. frank D. difficult第三十一页，共五十三页。Do you know about: the procedure works of a sheep? 第三十二页，共五十三页。第三十三页，共五十三页。克隆羊诞生克隆羊诞生(dnshng)(dnshng)图示图示第三十四页，共五十三页。 “多利多利”的诞生标志着克隆研究取的诞生标志着克隆研究取得新的进展和重大突破得新的进展和重大突破, ,而且这个结果证而且这个结果证明明: :动物

20、体中执行特殊功能动物体中执行特殊功能, ,具有特定形具有特定形态的所谓高度分化的细胞与受精卵一样态的所谓高度分化的细胞与受精卵一样具有发育成完整个体的潜在能力具有发育成完整个体的潜在能力(nngl)(nngl)。也就是说也就是说, ,动物细胞与植物细胞一样动物细胞与植物细胞一样, ,也也具有全能性具有全能性. .“多利多利”的诞生的诞生(dnshng)有什么重大的意义和影响？有什么重大的意义和影响？第三十五页，共五十三页。At first, the fact that Dolly developed _ in a natural way was _.Later, the news _Dolly

21、 had become seriously ill was _.Finally, the problem that occurred to the scientists was that a cloned animal lives_ the original one.Para 3The problems of Dollynormallyencouragingthatas long as / shorter than / longer thandisturbingshorter than第三十六页，共五十三页。The word “controversial” in Para 4 probably

22、 means :_. A. complicated B. arguable C. important D. traditionalPara 4The impact of DollyIts appearance raised and the media and public imagination.a storm of objectionshad a great impact on第三十七页，共五十三页。True or false:1People feared that Cloned Hitlers would do harm to the world.2 All the research in

23、to human beings will be forbidden.3 Some countries will use cloning in a wise way.Para 5Peoples reaction to cloningMany governments forbade research into human beings.第三十八页，共五十三页。 the author does not state any personal opinion about cloning. A. Objective (be fair) B. Negative (be against it) C. Posi

24、tive (be in favor of it)The writers attitude towards cloningBecause_第三十九页，共五十三页。 Detail reading 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 degenerative(变变质的）质的）_ in hum

25、ans. developtheillnessesproducecuresillnesses第四十页，共五十三页。Animal 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

26、plantsqualityforsaleEvil leaderusefulnew plant species moral objectionsendangered animals第四十一页，共五十三页。Find the main idea of each paragraph.Cloning is a way of making an exact copy of another animal and plant.Cloning has two major uses.The problems of Dolly.The effect of Dolly.It is forbidden to clone

27、 human beings. Para 1. Para 2. Para 3. Para 4. Para 5. 第四十二页，共五十三页。Fill in the chart about the advantages and disadvantages of cloning.第四十三页，共五十三页。Advantage(good points)Disadvantage(bad points)Collecting information Cloning is beneficial toIt can make more profits forWe could use cloning to cureClon

28、ing can help saveCloning can provide a copy of a child for a couple Animals clones get ill andAgainst natureAnimals clones may develop the illness ofEvil leaders may want toPeople are afraid that scientists will create thousands of copies of the same person.gardeners and farmersendangered animalswho

29、se child has dieddie youngolder animalsclone themselvesillnesshumans第四十四页，共五十三页。Practice activity: Debate Are you in favor of cloning or against cloning? State your point of view on it. For Against第四十五页，共五十三页。 Cloning is valuable for _ research on animals. medicalAdvantages of cloning Medical clonin

30、g could produce _for serious illnesses in humans.cures Cloning plants can produce large _ of plants for _.quantities Cloning plants can be useful for research on _ _ _.speciesplantsalenew第四十六页，共五十三页。Problems of cloning Animal clones may develop the _ of older animals Animal clones may die _ than the

31、 original animals. _ _may want to clone themselves. There are_ _ to cloning human beings.illnessesyoungerEvil leaders moralobjections第四十七页，共五十三页。We can conclude _A. Cloning is good for us.B. Cloning has two aspects.C. If cloning is used in a correct way it can bring many convenience to us.D. If clon

32、ing is used in an evil way it can cause much trouble.We should use cloning in a wise way !第四十八页，共五十三页。As a coin has two sides, everything has two aspects. On one hand, if cloning is used in a correct way it can bring many convenience to us. On the other hand, if cloning is used in an evil way it can

33、 cause much trouble. Therefore, we should use cloning in a correct way.第四十九页，共五十三页。Homework Finish off Ex.1, 2, 3 on Page13.第五十页，共五十三页。第五十一页，共五十三页。第五十二页，共五十三页。内容(nirng)总结Reading。Dolly是世界上第一例用体细胞乳腺上皮细胞,通过细胞核移植技术,在复杂的人工操作下,得到(d do)的一只小绵羊。克隆的荧光小猪(左)和正常小猪(右)。也就是说,动物细胞与植物细胞一样,也具有全能性.。“多利”的诞生有什么重大的意义和影响。Bye Bye第五十三页，共五十三页。