选修八 2.7Unit 2　warmingup.ppt

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1、新课标人教版课件系列,高中英语选修(模块）8-2.7,Unit 2 Cloning warming up and speaking,Do you enjoy watching TV series?Have you ever seen Journey To The West?,What is clone?,Clone,Clone,also called reproduce asexually(无性生殖/繁殖),is the creation of cells or whole animals using DNA from a single“parent”,without using the no

2、rmal reproductive(有性生殖)process.The clone has the same DNA to the parent.,Whats clone?,clone,Natural clone,Man-made clone,Natural clone is one that occurs from the“parent”in a natural form of cloning without human help.Man-made clone is one that produced through human intervention(介入).,cactus,strawbe

3、rry,twins,pendulum orchid(吊兰),natural cloning examples,Man-made cloning examples,the important events in cloning history,In 5000B.C.(谷物选种)Human Beings began to choose the best seeds from some kinds of crops.That was the beginning of controlling life according to humans will.,In 1952:Cloning tadpole(

4、克隆蝌蚪)The American scientists created a copy of tadpole by means of using a tadpole cell.This tiny tadpole has become the first kind of cloning animal.,In 1978:The first case of tube infant(试管婴儿)appeared.A British doctor used the sperm（精液）of a man and fertilized(受精)it in a test tube(试管).Then transpla

5、nted(移植)the embryo(胚胎)into the womb(子宫)of a healthy mother.The first tube infant called Louis appeared.,In 1996,the famous sheep“Dolley”was cloned successfully,Dolley and the Father of Dolley Lanwilmut(伊恩.威尔姆),In 1998 A series of things were cloned.The scientists in Hawaii University cloned over 50

6、mice.Some private institutions(协会)successfully cloned little oxen.,In 2002,the scientists of A&M University in USA has bred the first cloned cat in the world.,Nowadays:Cloned dog,mouse,rabbit,goat,ox,pig appeared.China become the seventh country that has the ability to clone pigs.China has succeeded

7、 in using embryonic（胚胎的）cell to clone many animals.,The End,Thank you!,Quiz,Natural clone Man-made clone,strawberry,Is it natural clone or man-made clone?,identical dogs,Natural clone Man-made,cactus,twins,T or F questions 1 Clone can be from both natural clone and man-made clone.2 The sheep,named K

8、itty was the first successful clone of a mammal(哺乳动物).,T,F,3 Only strawberries and cactus(仙人掌)are natural clones.,F,4 Since Dolley,researcher have cloned a number of large and small animals including goats,cows,mice,pigs,cats,rabbits and dogs.5 A parent can clone a child who is dying of a terminal i

9、llness(不治之症).,T,F,Enjoy one play,Background:A man has lost his left hand,one day his friend tells him the news that a doctor can transplant one new hand for him.The play happens like this,Guessing:What will the doctor say at the end of the play?,Is cloning good or bad for us?Advantages Disadvantages

10、 Group 1 and 2 Group 3 and 4,Mini-Debate,Are you interested in the topic of cloning?Do you believe that we will have cloned human soon?Do you think a cloned human should have human rights?Do you support medical cloning?,Speaking,Interview about cloningSituation:A reporter from China Daily is interviewing three famous scientists about their opinions of cloning.,Do you think it is wise?Whats your opinion of?I think you should I agree with you that I would never accept,Please preview reading comprehension and get some information about Dolley,Homework,