Unit2--Cloning阅读课件(人教版选修8).ppt

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1、Top 10 inventions in 20th centuryatomic bombNo. 10No. 9space shuttleNo. 8televisionNo. 7artificial satelliteNo. 6aspirinaspirinNo. 5airlinerNo. 4personal computerNo. 3mobile phoneNo. 2internetNo. 1cloningwarming up & reading What do you think of? twinsthe samegenecloningDollycurecure moviemovieNatur

2、al clone orMan-made clone？Dolly the sheepA strawberry plantGrowing new plantsTwins is one that occurs in nature. A natural clone is one that is produced through human intervention.(人类介入）人类介入）A man-made cloneDolly the sheepShe was while the others were born .Dolly was a _ sheep.clonedHow does Dolly d

3、iffer from other sheep?clonednaturallySkim the following passage and get the main idea of each paragraph.Para 1Para 2Para 3Para 4Para 5ReadingThe definition（定义）（定义） of cloning The two major uses of cloning and the procedureThe problems of DollyThe effect of cloning in societyThe attitudes towards cl

4、oning The passage tells us that animal cloning raised and scientists are not sure about its .argumentsfutureWhats the writing style? Expositive(说明性的说明性的) Argumentative（议论性的）（议论性的） Narrative（叙事性的）（叙事性的）A.Descriptive（描写性的）（描写性的）Whats the main idea of the passage? Cloning happens both in _ and in_. The

5、y can be cloned by _ and_.plantsanimalsthemselveshumansNatural cloneMan-made clonePara 1 The definition of cloningThe word “straightforward” means _. uncomplicated honest frank A.difficultPara 2The major uses and procedures of cloning The cloning of Dolly the sheep succeeded because_. A. its easier

6、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 failedThe determination and patience of the scientists paid off. (L9)Para 2The lamb is the clone of the ce

7、ll from sheep B because .A. it provides the egg cellB. it gives birth to the lambC. it provides the nucleusD. it is a female sheepPara 2产出产出有核卵细胞有核卵细胞无核卵细胞无核卵细胞体细胞体细胞取出细胞核取出细胞核用电融合用电融合细胞细胞代孕母羊代孕母羊细胞分裂形成胚胎细胞分裂形成胚胎How to produce a sheep（我也来当科学家（我也来当科学家）nAt first, the fact that Dolly seemed to develope

8、d _ was _.nThen, came the news that Dolly became_. nAltogether Dolly lived_, half the length of the life of _.Para 3The problems of Dollynormallyencouragingthe original sheepseriously illsix and a half yearsRemove the difficulties:（难不倒）nThen came the disturbing news that Dolly had become seriously i

9、ll.（分析句子结构）Para 3The problems of DollyThe sheep that donated the somatic cell most probably lived _years.A. 3 B. 6 C. 9 D. 13Problems: Cloned animals may develop the_of older animals.Cloned animals may lives _than the original one.as long as / shorter than / longer thanillnessesshorter Para 3The wor

10、d “controversial” in paragraph 4 probably means_. A. complicated B. arguable C. importantPara 4The impact of DollynOn the other hand, Dollys appearance raised a storm of objections and had a great impact on the media and public imagination. Remove the difficulties:（Translation）True or false:1 People

11、 feared that Cloned Hitlers would do harm to the world.2 All the research into human beings will be forbidden.3 Some countries to accumulate evidence of the abundant medical aid that cloning could provide.Para 5 Peoples reaction to cloningMany governments forbade research into human cloning.nRead fo

12、r information (Its your turn)Read the passage carefully and raiseyour questions in groups. One group read one paragraph and raise one or two questions according to the paragraph. (我也来当出题专家我也来当出题专家) Cloning is a way of _ an exact copy of another animal or plant. Cloning has two _ uses. Firstly, garde

13、ners use it to produce plants. Secondly, it is _ for medical research on animals. Cloning plants is straightforward but the cloning of animals is more_. The procedure is difficult to _. In 1996, scientists succeeded in _Dolly the sheep. Then came the disturbing news that Dolly was ill. _ Dolly lived

14、 for six years and a half , Dollys appearance raised a storm of _. Government became nervous and many _ research into human cloning. Scientists still _ whether cloning will help or harm us and where it is leading us.making major valuable complicated undertake cloning Altogether objections forbade wo

15、nder SummaryAnimal clones may develop of older animals.Use it to produce of plantsAnimal clones may lived than the donor animals.Cloning can be valuablefor . leaders may want to clone themselves.Religious leaders raised .Cloning can help save endangered animals. Fill in the chart using the informati

16、on from the text.the illnesses shorterEvilmoral questionscommercial quantitiesCloning plants can be valuablefor research onnew plant species.medical research on animals the author does not state any personal opinion about cloning. A. Objective (be fair) B. Negative (be against it) C. Positive (be in

17、 favor of it)The writers attitude towards cloningBecause_Is cloning good or bad for us ?Advantages Disadvantages Group 1 and 2 Group 3 and 4Mini-DebateAs 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 cause much trouble. Therefore, we should use cloning in a correct way.Homework Write a short passage about the advantages and disadvantages of cloning. At the end of your passage , you can add your own opinion.