Cloning -- Reading.ppt

1、Cloning: where is it leading us?,Unit 2,Book8 Unit 2 Cloning,Aims: 1.Get to know the definition of cloning. 2.Get to know the strength and weakness of it. 3.Make clear how the first cloning sheep Dolly came into being and be able to retell the procedure.,Skimming,Skim the text to find out the answer

2、s to the following questions.,Questions,1)What is cloning? 2) Whats the usage of cloning? 3) What are its benefits? 4) What are its problems?,Cloning is a way of making an exact copy of another animal and plant.,It happens both in _ and in_. They are both _,plants,animals,The definition of cloning,n

3、atural clones,While-Reading Para 1,“ be here to stay” is an idiom , which means “ be accepted and used by most people”,Question 1 What is the topic sentence of the first paragraph？,Cloning has always been with us and is here to stay.,Twins,They are born naturally and identical(一模一样) in _and _.,sex,a

4、ppearance,_clone,Natural,Natural clone,Question 2. What are the usages? Firstly, commercial Secondly, research,Para 2,In this paragraph, the word “straightforward” means _. A. uncomplicated B. honest C. frank D. difficult,Cloning plants is straightforward while(表对比) cloning animals is very complicat

5、ed.,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 failed,Details,Their determination an

6、d patience of the scientists paid off.,Dolly the sheep,Question: How does Dolly differ from other sheep? She was cloned while the others were born naturally. Dolly was a _ sheep.,be different from,cloned,In 1996, a sheep called Dolly was born. It is the first mammal to be cloned. It is considered to

7、 be the greatest success in the development of cloning.,Challenge yourselves Do you know about:,How did the cloned sheep Dolly come into being ?,True of false :,Four female sheep participate in the cloning of a new sheep. Electricity is needed in the procedure. Sheep B provides a somatic cell for th

8、e clone. The lamb is the exact copy of sheep A.,T,F,T,F,First, the fact that Dolly developed _ in a natural way was _. Later, the news that Dolly had become seriously ill was _. Finally, the problem that occurred to the scientists was that a cloned animal lives_ the original one.,Para 3,Question 4 :

9、The problems ?,normally,encouraging,A. as long as B. shorter than C. longer than,disturbing,shorter than,The word “controversial” in Para 4 probably means :_. A. complicated B. arguable C. important D. traditional,Para 4,Question: The impact of Dolly?,Its appearance raised and the media and public i

10、magination.,a storm of objections,had a great impact on,Para 5,Question: Peoples reaction to cloning ?,We can infer from the last paragraph that: The normal development of Dolly had no effect on the cloning of other species. B. There were arguments about animal cloning and concerns about the future

11、of cloning. C. Dolly successfully cloned a new lamb with the help of cloning scientists.,D. All the research into human beings will be forbidden.,Further understanding,the author does not state any personal opinion about cloning.,A. Objective (be fair) B. Negative (be against it) C. Positive (be in

12、favour of it),The writers attitude towards cloning,Because_,Para 1 A. The problems of Dolly Para 2 B. The two major uses of cloning Para 3 C. The attitudes towards cloning Para 4 D. The definition of cloning Para 5 E. The effect of cloning in society,conclusion:match the main idea with each paragrap

13、h,summary 根据课文内容进行填空，每空限填一词。 Cloning is a way of making an_1_copy of another animal or plant. Cloning plants is_2_while cloning animals is very complicated, which is very hard to_ _3_. But the scientists made a _4_in 1996, with the successful cloning of Dolly. However, Dolly became seriously ill, wh

14、ich made the cloning scientists cast down._5_， Dolly lived six and a half years.,exact,straightforward,undertake,breakthrough,Altogether,A storm of_6_was raised by Dollys appearance, which had a great impact on the media. Some governments _7_research into human cloning, while other countries continu

15、ed to_8_evidence of the abundant medical aid that cloning could provide. However, it still remains to be found by the scientists whether cloning is harmful or helpful to human beings.,objections,forbade,accumulate,What benefits can humans gain from cloning? What problems may arise when humans are cl

16、oned?,Consideration makes people smarter.,Cloning can make a woman who cant get pregnant(怀孕的） have a child.,The 10-year-old girl died in an accident in America, cloning can produce an exact girl of her.,At present our country lacks organs(器官）. The cloned man can transform his organs to his original

17、one(本体),Our cloning technology is not perfect. Some cloned babies have deformity(畸形） from birth.,Hitler : An evil leader,Star War: Episode 2: Attack of the clones 星战前传2：克隆人的进攻,The Sixth Day 第六日 (施瓦辛格),Conclusion,It can make more profits for,gardeners and farmers,We could use cloning to cure,illnesse

18、s,Cloning can help save,endangered animals,Cloning can provide a copy of a child for a couple,whose child has died,Cloned animals is easy to get ill and,die young,Against nature and raise moral questions,Animals clones may develop the illness of,older animals,Evil leaders may want to,clone themselves,People are afraid that scientists will create thousands of copies of the same person.,Cloning is a great breakthrough to human beings,Homework,Are y