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1、Module 5CloningWhat animals have been cloned ? DollyFirst cloned muleCloned monkeysFirst cloned horse First cloned cat1.What is cloning ?2.How can we clone something?Free talkRead these words and decide which ones you are likely to see in the passage. acid bacteria embryos enzyme experience gene hum
2、an tissue organism plant psychological stem cell structure upbringingBefore Reading（possibly） 1. DNA ? 2. Enzyme ? 3. A clone ？ Fast-readingpara 13DNA the fundamental component of life enzymechemicals formed in the bodya clonean organism which is genetically identical to anotherDolly5 How many possi
3、ble reasons for cloning are mentioned in the passage ? Fast-readingFourpara 47Careful-reading1. who discovered the structure of DNA? When ? 2. What did Mendel understand in 1866 ？1953Watson and CrickHe understood that both the parent plants had influenced the genetic make-up of the new plant. Para 1
4、Careful-reading Find the expressions1.解码解码DNA 2.截取一段序列的基因截取一段序列的基因3.3. 把它们插入宿主细胞把它们插入宿主细胞Unzip the DNACut out a sequence of genesInsert them into the host cell How can we clone something ? Cloning takes the DNA from a single cell to create a whole individual.Para 2&3Careful-readingFind the expressio
5、ns1.正当的理由正当的理由2.可供选择的治疗可供选择的治疗方法方法3.未知的心理压力未知的心理压力 4.选择人生道路选择人生道路5.拥有新的缺点拥有新的缺点6.原有的美德原有的美德valid reasonsan optional treatment unknown psychological pressurechoose a path in lifepossess new vicesexisting virtuesPara 4&5 Valid reasons (advantages) Disadvantages As an optional treatment for couples who
6、 find it difficult to have childrenA clone would be under unknown psychological pressurereproduce the talents of exceptional peopleA clone may possess new vices instead of existing virtuesCareful-readingExplain the expressions1. recover from a disease2.修复人体组织修复人体组织3.一只优选奶牛一只优选奶牛4.rely on 5.限制生物品种的限制
7、生物品种的 多样性多样性6.at a crime scenerepair human tissuea price cow依靠，依赖依靠，依赖restrict the biodiversityof the breed在犯罪现场在犯罪现场Para 6-8从疾病中康复从疾病中康复 Valid reasons (advantages) Disadvantages To obtain a supply of stem cellsEmbryos made from clones would be wasted which some people would find unacceptable.To hel
8、p farmers grow resistant crops.To rely on a few cloned animals or crops would restrict biodiversityActivity 2 Answer the questionsWhat is_?1 DNA2 a clone3 a stem cellp1 the fundamental component of lifep3 an organism which is genetically identical to another p6a cell that can develop into every othe
9、r type of cell 4 the genetic make-up of a person or a plant5 bacteria6 an enzyme p1the particular genes that give a person their physical characteristicsP7 very small organisms that cause diseasesP2 chemicals formed in the bodyActivity 4 Read the passage and find the paragraphs which describe:(a)Whe
10、n the structure of DNA was discovered(b) how to clone something(c) four possible reasons for cloning(d) the disadvantages of cloning Para 1Para 2.3Para 4.5.6.7Para 4.5.6.7 Activity 5 Choose the best answers.1 The science of genetics was discovered by_.(a)Mendel(b)Watson and Click(c)Cohen and Boyer(d
11、)Einstein a2 Cloning humans from their parents has the disadvantages that_.(a) it is a treatment for couples who want children.(b) it could create an exceptional human being.(c) we cannot predict the psychological effects(d) the clone may not lead the same life c3 Stem cell can be used to _(a)develo
12、p into enzymes(b) create prize winning animals(c) solve crimes(d) help people recover their good health d4 Clones of exceptional human beings _.(a)would be under unknown psychological pressure(b) would have different experiences and upbringing from ordinary people(c) would allow us to bring Einstein
13、 back to life(d) may have different characteristics from the original d5 If we can be sure that the embryo will not be wasted, _.(a)Cloning to obtain stem cell would be acceptable to many people(b) stem cells could develop into every other type of cell in the body(c) cloning would need to be control
14、led by a voluntary code of practice or government regulations(d) cloning can be used to create animals and crops aActivity 6 Answer the questions1 What regulations on cloning do some people think should be compulsory?To control the use of cloning.2 How do peoples fingernails help solve crimes?Becaus
15、e there is information about someones DNA under their fingernails.3 Why is taking stem cells from embryos controversial?Because the embryos might be wasted during research.4 How might a prize cow or cloned crops be handy?They could resist bacteria and diseases.5 How many valid arguments in favour of
16、 cloning did you read in the passage?Students own idea.6 Why would a scientist or a farmer want to resist rot or pets?So that he can guarantee a harvest or get a bigger harvest.7 What sort of vices might be unacceptable in a cloned person?The same as in anyone else.8 If DNA is a transparent acid, ca
17、n you see through it?Yes9 If the results of two similar experiments are contradictory, can both results be true?No10 Is a fundamental component important or not?Its important.Language Points1 Its true that it为形式主语，that引导的句子作真正的主语 eg: Its true that he has been to America.= That he has been to America
18、 is true.2 under pressure 有压力 under construction/ reconstruction/ way/ repair 在建造中/ 重建中/ 进行中/ 维修中3 supply n water/ gas/ electricity supply and demand 供求关系 v supply sb with sth supply sth to sb 拓展： provide sb with sth provide sth for sb offer sb sth offer sth to sb4 recover from 从中恢复过来 eg: Its surpri
19、sing that the old lady recovered from the disease. Is it right to clone human beings ？ Discussion ConclusionScience is a two-edge sword.Role-playhomeworkSurf the Internet to find more information about cloning and write a composition : My View on Cloning Tips You can write as follows:1. Are you for or against cloning?2. Give your reasons. Use these words: “firstly secondly lastly”3. Give examples to support your idea.You can see the example on P 66