人教版选修8unit2cloningreading公开课PPT课件

1、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没爹没娘的多莉羊第1页/共31页The worlds first cloned cat, kitten, namedCc. It was created using a cell taken from an adult cat, Rainbow.第2页/共31页Dog Snuppy was created by Korean a

2、nd American scientists第3页/共31页Its name is Andi, the first genetically modified monkey.第4页/共31页cloned rabbit克隆的荧光小猪(左)和正常小猪(右)克隆马及其“母亲兼姐姐”第5页/共31页A strawberry plantThe plant produces its own The plant produces its own runners.runners.Not only animals but also plants can be cloned第6页/共31页A stem Take f

3、rom growing plants to make new ones. 第7页/共31页They are identical in sex and appearance, who are produced from the same original egg. 第8页/共31页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.第9页/共31页

4、Clone? Natural cloneMan-made 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) .第10页/共31页 In pairs, look at these pictures and discuss which ones are natural clones and which ones ar

5、e man-made. Explain how they differ.Warming up第11页/共31页natural clones第12页/共31页natural clones第13页/共31页cloned animals 第14页/共31页NO. The first two are man-made clones, the rest two are natural clones.第15页/共31页第16页/共31页Fast-readingTask 1 Read the letter , then try to find the main idea of each paragraph.

6、1.Cloning is _ 2.Cloning has _ uses.3.The _ of Dolly.4. The _ of Dolly.5. It is _ to clone human beings. a way of making an exact copy of another animal and blemstwo majoreffectforbidden第17页/共31页1.The main idea of the text is_ A. animal cloning is very valuable and can benefit the world. B.

7、 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.Choose the right answer according to the text.第18页/共31页2. It can be inferred fr

8、om the passage that a cloned animal_. A. usually lives as long as the original one B. usually lives longer than the original one C. usually lives shorter than the original one D. is usually as healthy as the original one第19页/共31页3. Which statement is NOT true ? A. Cloning is something that has been

9、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.第20页/共31页4. The cloning of Dolly the sheep succeeded because_. A. its easier to clone a sheep

10、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 failed第21页/共31页5. The sheep that donated the somatic cell most probably lived _ years. A. 3 B. 6 C. 9 D. 12第22页/共31页How is

11、a clone produced?第23页/共31页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 lamb is the exact copy of sheep A.TFTF第24页/共31页Advantages of cloning1.Medical cloning could produce cu

12、res 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 animals.第25页/共31页Problems or dangers of cloning 1. Animal clones may develop the illnesses of old

13、er 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.第26页/共31页A.Expositive （说明性的）（说明性的） B. Descriptive C. Argumentative （议论性的）（议论性

14、的） D. Narrative2. The writers reaction towards cloning is_ A. Positive B. Negative C. neutralChallenge yourself第27页/共31页Consolidation Clone is a way of making an exact_ of another animal or plant. Cloning have two _ uses. Firstly, gardeners use it all the time to produce _quantities. Secondly, it is

15、 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. copymajorcommercialspeciesbirthmoralreligious第28页/共31页 Cloning people is a good thing ,or a bad thing?克隆人是福音, 还是恶兆？ThinkingOh! My God! I was cloned!第29页/共31页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 man