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ReadingIn pairs,look at these pictures and discuss which ones are natural clones and which ones are man-made.Explain how they differ.Discussion一株草莓依靠它沿地一株草莓依靠它沿地“爬走爬走”的匍匐的匍匐茎茎,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TwinsThey are born naturally and identical in sex and appearance.Dolly是世界上第是世界上第一例用体细胞一例用体细胞乳乳腺上皮细胞腺上皮细胞,通过通过细胞核移植技术细胞核移植技术,在复杂的人工操在复杂的人工操作下作下,得到的一只得到的一只小绵羊小绵羊。What is a clone?1.How is a clone produced?Reading Please Please Listen to the tapeListen to the tape anand get d get the main idea,and then finish the the main idea,and then finish the following exercises in groups.following exercises in groups.1.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 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.Cloning is something that has been developed quite 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.细枝末节细枝末节A3.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 failedB4.The sheep that donated the somatic cell most probably lived _ years.A.3 B.6 C.9 D.12推理判断推理判断5.Dolly the sheepA.looked exactly like the sheep that provides the eggB.was the exact copy of the sheep that provides the nucleusC.looked like the sheep that gave birth to itD.had the characteristics of all three sheep6.What about the writers attitude toward cloning in this passage?A.A.Objective(be fair)B.Negative(be against it)C.Positive(be in favor of it)the author does not state any personal opinion about cloning.Because_观点态度观点态度Main ideas Read the passage and find out the main idea of each paragraph.Para.1 The definition of cloningPara.2 The major uses and procedures of cloningPara.3 The problems of DollyPara.4 The effect of DollyPara.5 Peoples reaction to cloning “多利多利”的诞生标志着克隆研究的诞生标志着克隆研究取得新的进展和重大突破取得新的进展和重大突破,而且这个结而且这个结果证明果证明:动物体中执行特殊功能动物体中执行特殊功能,具有具有特定形态的所谓高度分化的细胞与受特定形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精卵一样具有发育成完整个体的潜在能力。也就是说能力。也就是说,动物细胞与植物细胞动物细胞与植物细胞一样一样,也具有全能性也具有全能性.“多利多利”的诞生有什么重大的意义和影响？的诞生有什么重大的意义和影响？1996 cloning sheeps2001 cloning cattle2002年4月16日美国第一头克隆牛“艾米”产下牛犊喜作妈咪我国成功繁殖克隆兔我国成功繁殖克隆兔 体形要比普通兔大许多体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。2002 cloning cats第一只克隆宠物猫克隆马及其“母亲兼姐姐”2005 cloning dogs克隆的荧光小猪(左)和正常小猪(右)Thinking Look at these pictures,and think about this question.Is cloning people a good thing or a bad thing?
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