人教版选修8unit2cloningreadin课件.ppt

1、Period 1 Warming up&Reading She was c_while the others were born naturally.It is the exact copy of another sheep and the first cloned mammal.lonedDolly the sheep没爹没娘的多莉羊没爹没娘的多莉羊The worlds first cloned cat,kitten,namedCc.It was created using a cell taken from an adult cat,Rainbow.Dog Snuppy was creat

2、ed by Korean and American scientistsIts name is Andi,the first genetically modified monkey.cloned rabbit克隆的荧光小猪克隆的荧光小猪(左左)和和正常小猪正常小猪(右右)克隆马及其克隆马及其“母亲兼姐姐母亲兼姐姐”A strawberry plantThe plant produces its own The plant produces its own runners.runners.Not only animals but also plants can be clonedA stem T

3、ake from growing plants to make new ones.They are identical in sex and appearance,who are produced from the same original egg.Questions about cloning1.What is cloning?Cloning is a way of making an exact copy of another animal or plant.They include natural and man-made clones.Clone?Natural cloneMan-m

4、ade cloneNatural clone is one that occurs 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).In pairs,look at these pictures and discuss which ones are natural clones and which ones are man-made.Explain how they differ.Warm

5、ing upnatural clonesnatural clonescloned animals NO.The first two are man-made clones,the rest two are natural clones.Fast-readingTask 1 Read the letter,then try to find the main idea of each paragraph.1.Cloning is _ 2.Cloning has _ uses.3.The _ of Dolly.4.The _ of Dolly.5.It is _ to clone human bei

6、ngs.a way of making an exact copy of another animal and plant.problemstwo majoreffectforbidden1.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

7、 Dolly the sheep was born.D.animal cloning raised arguments and scientists are not sure about its future.Choose the right answer according to the text.2.It can be inferred from the passage that a cloned animal_.A.usually lives as long as the original one B.usually lives longer than the original one

8、C.usually lives shorter than the original one D.is usually as healthy as the original one3.Which statement is NOT true?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

9、.Animal cloning is much more difficult than plant cloning.4.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

10、clone mammals failed5.The sheep that donated the somatic cell most probably lived _ years.A.3 B.6 C.9 D.12How is a clone produced?True of false:1.Four female sheep participate in the cloning of a new sheep.2.Electricity is needed in the procedure.3.Sheep B provides a somatic cell for the clone.4.The

11、 lamb is the exact copy of sheep A.TFTFAdvantages of cloning1.Medical cloning could produce cures for serious illnesses in humans.2.Cloning plants can produce plants of similar quality for sale.3.Cloning plants can be useful for research on new plant species.4.Cloning can help save endangered animal

12、s.Problems or dangers of cloningv1.Animal clones may develop the illnesses of older animals.2.2.Animal clones may die Animal clones may die younger than the donor animals.younger than the donor animals.3.Evil leaders may want to clone themselves.4.There are moral objections to cloning human beings.A

13、.Expositive （说明性的）（说明性的）B.Descriptive C.Argumentative （议论性的）（议论性的）D.Narrative2.The writers reaction towards cloning is_ A.Positive B.Negative C.neutralChallenge yourselfConsolidation Clone is a way of making an exact_ of another animal or plant.Cloning have two _ uses.Firstly,gardeners use it all th

14、e time to produce _quantities.Secondly,it is valuable for research on new plant _and for medical research on animals.But through the _and death of Dolly,cloning has a lot of problems.On the other hand,we know cloning is controversial in some countries for _and _reasons.copymajorcommercialspeciesbirt

15、hmoralreligious Cloning people is a good thing,or a bad thing?克隆人是福音克隆人是福音,还是恶兆？还是恶兆？ThinkingOh!My God!I was cloned!As a coin has two sides,everything has two aspects.On the one hand,if the cloning is used in a correct way it can bring many conveniences to us.Such as:curing serious illnesses and being used to produce commercial qualities of plants.On the other hand,if the cloning is used in an evil way it can cause much troubles:such as moral questions.