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1、Look at the following pictures and answer the questions: Its the most famous sheep in the world. Do you know how Dolly is different from other sheep?Warming up ( 5ms ) She was cloned while the others were born naturally. It is the copy of another sheep. What is cloning? Cloning is a way of making an

2、 exact copy of another animal or plant.Man-made cloning examples cactusstrawberry pendulum orchid(吊蘭吊蘭)natural cloning examples 1. Cloning means making a copy of an animal. 2. Gardeners can make a lot of money by cloning plants. 3. Cloning animals is as complicated as cloning plants. FTFTT4. Dolly t

3、he sheep was the first successful clone of a mammal. 5. Natural clones happen in animals as well as in plants.6 Clone can be from both natural clone and man-made clone . T7 Only strawberries and cactus(仙人仙人掌掌) are natural clones . FStep 3: Prediction What do you think the article is about by reading

4、 this headline?A.Cloning. B.Dolly the sheep . C.It will lead us to some places.SCANNING _.Cloning has two major uses._.Cloning is a way of making an exact copy of another animal and plant_. The effect of Dolly._. It is forbidden to clone human beings._.The problems of Dolly.12345Main idea of each pa

5、ragraph.Cloning is a way of making an exact copy of another animal and plant.Para 1. 1. What is a clone?natural clone2. When does a clone happen? It happens in plants when gardeners take cuttings from growing plants to make new ones.in plants:natural clone2. When does a clone happen? It happens in p

6、lants when gardeners take cuttings from growing plants to make new ones.in plants:in animals: Twins are produced from the same original egg and are identical in sex and appearance.一株一株草莓依靠它沿地草莓依靠它沿地“爬走爬走”的匍匐的匍匐莖莖,一年內(nèi)就能長出數(shù)百株草莓苗一年內(nèi)就能長出數(shù)百株草莓苗Other examples:natural cloneman-made clonein plantsin animals

7、Dolly是世界上第一例用是世界上第一例用體細(xì)胞體細(xì)胞乳腺上皮細(xì)胞乳腺上皮細(xì)胞,通過通過細(xì)胞核細(xì)胞核移植技術(shù)移植技術(shù),在在復(fù)雜的復(fù)雜的人工操作下人工操作下,得到得到的一只小綿羊的一只小綿羊 。nucleus be complicatedman-made cloning examples THE IMPORTANT EVENTS IN CLONING HISTORYIn 5000B.C. ( 谷物選種谷物選種) In 1978: The first case of tube infant (試管嬰兒試管嬰兒 ) appeared.Dolly and the Father of Dolly Lan

8、wilmut( 伊恩伊恩.威爾威爾姆姆)In 1996, the famous sheep “Dolly” was cloned successfully In 1998 a cloned ox. In 2002, the first cloned cat in the world.Nowadays : Cloned dog, mouse, rabbit, goat, ox, pig appeared . China become the seventh country thathas the ability to clone pigs.A series of things are clone

9、d. Main ideaCloning has two major uses.Para 2. Firstly, Gardeners use it to produce commerical plants. Secondly, It is valuable for research on new plant species and for medical research on animals.backDISCUSS IN GROUPS:How long did Dolly live?How long does the orginal sheep live ?What are the advan

10、tages of cloning?Why did governments forbid research into human cloning?Whats your opinion? Why?Main ideaThe problems of Dolly.Para 3. 1. The news that _2.Dollys illnesses were more _a much older animal.3.Dolly lived for six years, the life of the original sheep.Dolly had become seriously ill came.a

11、ppropriate to half the length ofMain idea The effect of Dolly. 1.Dollys appearance raised a storm of objections. 2.It opened everybodys eyes to the possibility of using cloning to cure serious illnesses, and even producing human beings. Para 4. BaMain ideaIt is forbidden to clone human beings. Para

12、5. Scientists wonder whether cloning will help or harm us.BaIs cloning people a good thing, or a bad thing?克隆人是福音克隆人是福音, 還是惡兆？還是惡兆？1.克隆技術(shù)現(xiàn)在還不成熟克隆技術(shù)現(xiàn)在還不成熟,克克隆人可能有很多先天性生理隆人可能有很多先天性生理缺陷。缺陷。2.克隆人的身份難以認(rèn)定克隆人的身份難以認(rèn)定,他他們與被克隆者之間的關(guān)系無們與被克隆者之間的關(guān)系無法納入現(xiàn)有的倫理體系。法納入現(xiàn)有的倫理體系。反對克隆人反對克隆人3. 克隆技術(shù)有可能被濫用克隆技術(shù)有可能被濫用, ,成為恐成為恐怖

13、分子的工具。怖分子的工具。4. 從生物多樣性上來說從生物多樣性上來說, ,大量基因大量基因結(jié)構(gòu)完全相同的克隆人結(jié)構(gòu)完全相同的克隆人, ,可能誘可能誘發(fā)新型疾病的廣泛傳播發(fā)新型疾病的廣泛傳播, ,對人類對人類的生存不利。的生存不利。1. “不讓我們克隆人不讓我們克隆人,就是不讓就是不讓我們修正我們的錯誤我們修正我們的錯誤,人類人類 歷 史 難 道 能 夠 這 樣 構(gòu) 造歷 史 難 道 能 夠 這 樣 構(gòu) 造嗎？嗎？”紐約時報書評紐約時報書評2. “當(dāng)然應(yīng)該當(dāng)然應(yīng)該克隆克隆人人,如果如果誰第一個掌握了這個技術(shù)誰第一個掌握了這個技術(shù),他就是我真正的、也是唯一他就是我真正的、也是唯一的競爭對手。的競爭

14、對手?！北葼柋葼柹w蓋茨茨支持克隆支持克隆人人意大利狂人醫(yī)生意大利狂人醫(yī)生:安蒂諾里安蒂諾里冒死也要克隆人的冒死也要克隆人的科學(xué)家科學(xué)家:布瓦瑟利耶布瓦瑟利耶1. The main idea of the text is_ Animal cloning raised arguments (引起爭論）引起爭論）and scientists are not sure about its future.主旨大意主旨大意2. Which of the following statements about cloning is NOT true according to text? _ A. Clonin

15、g is something that has been developed just recently. B. Twins that look exactly the same are originally from the same egg. C. Cloning is used by gardeners to make more money. D. Animal cloning is much more difficult than plant cloning.細(xì)枝末節(jié)細(xì)枝末節(jié)A3. The cloning of Dolly the sheep succeeded because_. T

16、he determination and patience of the scientists was rewarded. 細(xì)枝末節(jié)細(xì)枝末節(jié)4. The lamb is the clone of the cell from sheep because_. A. it provides the egg cell B. it gives birth to the lamb C. it provides the nucleus D. it is a female sheep1. In the second paragraph, the word “straightforward” means _.A

17、. uncomplicated B. honest C. frank D. difficult猜詞：猜詞：It can be inferred from the passage that: A cloned animal usually dies earlier than the original one.推理：推理：6. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 127. What about the writers attitude toward cloning in this passage?A.The writer is against cloning.B. The writer is in favor of cloning.C. The writer does not state any personal opinion about cloning.D. The writer is in agreement with cloning.The end