英语：Unit2《Cloning》课件(新人教选修8).ppt（无音视频）

1、UNIT TWO READING CLONING : WHERE IS IT LEADING US Skim the text to find out the answers to the following questions. 1.What is cloning?Skimming Cloning is a way of making an exact copy of another animal and plant.Skim the following passage and match the paragraph with the correct sentence.Para 1 A.Th

2、e problems of DollyPara 2 B.The two major uses of cloningPara 3 C.The attitudes towards cloningPara 4 D.The definition of cloningPara 5 E.The effect of cloning in societyScanning1.Do you think cloning plants is straightforward or complicated? What about cloning animals?Cloning plants is straightforw

3、ard while cloning animals is complicated.The important events in animal cloning historyIn 1952 tadpole was cloned . It is the first animal to be clonedIn 1963 , an Asian carp(鲤鱼）鲤鱼） was cloned . Ten years later, a Chinese scientist named Tong dizhou cloned a European carp.In 1996, a sheep called Dol

4、ley was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning.A macaque （猕（猕猴）猴）was cloned in 2000. Later scientists cloned many monkeys . It can be used to test out some diseases such as diabetes(糖尿病）糖尿病）Mules (骡子） have no ability to gi

5、ve birth to a baby. A mule was cloned in 2003. It is the first animal which lack fecundity (生育能力）to be cloned.Whats the greatest success in the development of animal cloning?.The procedure of the cloning of Dolly the sheepTask III Intensive readingTrue or false:1.Cloning means making a copy of an an

6、imal or a plant. ( )2.Gardeners can make a lot of money by cloning plants. ( )3.Cloning is something that has been developed quite recently. ( )4.Dolly the sheep was the first successful clone of a mammal. ( )5.The cloning of Dolly the sheep succeed because the scientists were determined and work ha

7、rd with patience. ( ) FTFTT1.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 birth to it D. had the characteristics of all three sheepTask IV: Choose the best answer.2.The main id

8、ea of the text : 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 futu

9、re.3.The sheep that donated the somatic cell most probably lived _years.A. 3 B. 6 C. 9 D. 134. Which of the following is not an advantage of cloning?A.Cloning can be used for medicine purposes.B.Large quantities of food can be produced by cloning.C.Cloning can help keep animals from becoming extinct

10、.D.Famous person who have passed away can be cloned.5.The writer s point of view in this reading passage:A.He/She is confused about cloning.B.He/She is in favor of cloning.C.He/She is against cloning. D.He/She is impartial. Problems /dangers of cloningAdvantages of cloningAnimal clones may develop t

11、he illnesses of older animals.Medical cloning could produce cures for serious degenerative illnesses in humans.Animal clones may die younger than the donor animals.Cloning plants can produce plants of similar quality for sale.Evil leaders may want to clone themselves.Cloning plants can be useful for

12、 research on new plant species.There are moral objections to cloning human beings.Cloning can help save endangered animals.Task IV: Fill in the chart using the information from the text.Practice activity: Debate Are you in favor of cloning or against cloning? What is your point of view on it? Homework Write a short passage about the advantages and disadvantages of cloning. At the end of your passage ,you can add your own opinion.