同课异构cloning课件.ppt

1、Welcome to our class!Ready to have fun learning English?Teaching aims:1.Get the Ss to improve reading skills.2.Make the Ss learn more about cloning.3.Let the Ss master the target words,phrases and sentence structures.选修八选修八Unit 2 CloningReading Lets enjoy a movie clipTwinsThey are born naturally and

2、 identical in sex and appearance.A strawberry plantThe new plants that grow from the runners are exact copies of the original plant.一株草莓依靠它沿地一株草莓依靠它沿地“爬走爬走”的匍匐茎的匍匐茎,一年内就能长出数百株草莓苗。一年内就能长出数百株草莓苗。Growing new plantsWhat do you know about Clone?Natural cloneMan-made cloneNatural clone is one that occurs

3、from the“parent”in a natural form of cloning without human help.Man-made clone is one produced through human intervention(介入介入).natural clonesnatural clonesman-made clonescloned animals 富贵竹插枝即活富贵竹插枝即活The gardener should cut the plant,then the cutting produce another new plant.1996 cloning sheep2001

4、cloning cattle2005 cloning dogsThe advanced technique in genetics(遗传学遗传学)with which scientists can create or copy things with the same DNA.What is a clone?Discussion Scientific Definition Cloning is the creation of cells or whole animals by using DNA from a single“parent”,not with the normal reprodu

5、ctive process.The clone has the same DNA to the“parent”.A.The attitudes towards Dollys appearance.B.The problems of Dolly.C.The definition of Cloning.D.The effect of cloning on society.E.Cloning has two major uses.Para.1Para.2Para.3Para.4Para.5The main idea of each paragraph.Present the procedure of

6、 How to produce the sheep Dolly1.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 developed because Dolly the sheep was born.D.animal cloning raised arguments and

7、 scientists are not sure about its future.Skim the text and choose the best answers.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

8、.D.many other attempts to clone mammals failed.careful reading3.The sheep that donated the somatic cell most probably lived _ years.A.3 B.6 C.9 D.134.The word“controversial”in Para 4 probably means _.A.complicated B.arguable C.important D.important推理判断推理判断5.Which of the following statements about cl

9、oning is NOT true according to the passage?A.Cloning is something that has been developed quite recently.B.Twins that look exactly the same are originally from the same original egg.C.Cloning is used by researchers to develop new plants.D.Animal cloning is much more difficult than plant cloning.the

10、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)6.The writers attitude towards cloning?Because_根据课文内容语法填空Cloning has always been with us and is here to stay.Its a way of making an 1.(exactly)copy of another animal or

11、plant.Cloning has two major uses.Firstly,gardeners use it all the time to produce commercial quantities of plants.Secondly,its 2._(value)for research on new plant species and for medical research on animals.Cloning animals is a difficult task 3.(undertake).At last the determination and patience of t

12、he scientists paid 4.in 1996 with a breakthroughthe cloning of Dolly the sheep.exact valuable to undertake off The fact 5.she seemed to develop normally was very encouraging.Then came the disturbing news that Dolly had become 6.(serious)ill and she only lived six and a half years.Dollys appearance r

13、aised a storm of 7.(object)and had a great impact on the media and public imagination.Newspapers wrote of evil leaders hoping to clone 8.(they)to attain their ambitions.Religious leaders raised moral questions.Now some governments have 9.(forbid)research into human cloning,10.others think cloning is

14、 useful for humans.that seriously objections themselves forbidden while/but Debate Are you in favor of cloning or against cloning?What is your point of view on it?Disadvantages of cloningAdvantages of cloningAnimal clones may develop of older animals.Use it to produce of plantsAnimal clones may live

15、d than the donor animals.Cloning can be valuablefor .leaders may want to clone themselves.Religious leaders raised .Cloning can help save endangered animals.the illnesses shorterEvilmoral questionscommercial quantitiesCloning plants can be valuablefor research onnew plant species.medical research on

16、 animals1.Cloning not only happens in _,but also in _.2.Cloning has two _ _.First,it can help gardeners produce_ _ _ _.Second,it is valuable for research on _ _ _and for medical research on _.Cloning plants is _ while cloning animals is very _.3.Cloning became _.Using cloning to _ _ _.Cloning is a w

17、ay of _ an exact copy of another animal or plant.Cloning has two _ uses.Firstly,gardeners 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 _D

18、olly the sheep.Then came the disturbing news that Dolly was ill._ Dolly lived 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 majo

19、r valuable complicated undertake cloning Altogether objections forbade wonder Homework:Write a composition about cloning according to your debate.(假如你是李华，就克隆问题作了一次调查，并假如你是李华，就克隆问题作了一次调查，并写信给写信给XXX杂志社编辑，话题：杂志社编辑，话题：Whats your opinion about cloning?开头已给出，结合自己的观点写一篇开头已给出，结合自己的观点写一篇100词左词左右的作文。右的作文。Dear editor，Im a student from Huichang senior high school.Recently,our class has made a survey about cloningLihua 祝您成功！