cloning-and-DNA-newPPT课件.ppt

1、.1Module 5 Cloning.2Welcome to my English class!.3Dolly (1997-2003).4What other animals have been cloned ? First cloned muleCloned monkeys.5First cloned horse First cloned cat.6.7 Vocabulary and Reading Cloning and DNA .8Revisiontechnical terms基因基因 gene酸性的酸性的 acid细菌细菌 bacteria胚胎胚胎 embryo酶酶 enzyme 组织

2、组织 tissue有机体有机体 organism干细胞干细胞 stem cell基因的，遗传学的基因的，遗传学的 genetic生物多样性的生物多样性的 biodiversity.9Read the passage and find the paragraphs which describe:1. when the structure of DNA was discovered 2. how to clone something 3. four possible reasons for cloning 4. the disadvantages of cloning5. the research

3、 into DNA has helped solve crime6. Cohen and Boyer discovered a procedureP1P1P3P3P4-7P4-7P4-7P4-7P8P8 Fast readingP2P2.10a transparent twisting laddermade of the fundamental components of lifeDNAIntensive reading1.Please describe the structure of DNA. 2.What is the relationship between DNA and gene?

4、P1.11Gene is part of DNAthat controls how it developsrelationship.12Intensive readingP2Please describe the procedure which Cohen and Boyer discovered.use enzymesto cut outand to insert and combine.13What is a Clone?A clone is an organism which is genetically identical to another one.But rememberWe=

5、Our genes + Our environmentIntensive readingP3.14Para. 1 -Para. 3Time Scientist Discovery186619531973Mendel Watson and CrickCohen and Boyerboth parent plants have influenced the genetic make-up of the new plantThe structure of acid DNAA procedure to use enzymes to unzipthe DNA, to cut out a sequence

6、 of genes and finally insert them into the host cell and combine with its DNA.15MendelWatson and CrickBoyerCohen.16Summary: reasons for cloningThere are many valid reasons for cloning. The first reason is cloning can be an_treatment for couples who find it _ to have children. Another reason is to re

7、produce the talents of _ human beings. A further reason is to obtain a _ of stem cells. A fourth reason for cloning is that some scientists and farmers think it would be_to clone a prize cow which can _ bacteria or disease, or to sow a _ crop. Finally, the _ research into DNA has helped solve _.opti

8、onaldifficultexceptionalsupply handyresistclonedlatest _P4-8crimes.17 an _ treatment for couples who cant have childrenreproduce the _ of exceptional human beingsobtain stem cells in embryoswhich are very _and can develop into every other type of cellsuffer from unknown psychological _ be _to the or

9、iginal one many people find the wasted embryo _ be _ to clone a prize cow resisting bacteria or disease would _ the biodiversity of the breed optionalcontradictory flexibleunacceptablehandyAdvantagesDisadvantages P4-7restrictpressuretalents.18P1(DNA and gene)P3(cloning)P8(DNA in helping solve crime)

10、P4-7(advantages and disadvantages)Structure of the passageP2(procedure).19Choose the best answers. The science of genetics was discovered by _. A. Mendel B. Watson and Crick C. Cohen and Boyer D. Einstein A.202. Cloning humans from their parents has the disadvantage that_. A. it is a treatment for c

11、ouples 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 C .213. Stem cells can be used to _. A. develop into enzymes B. create prize winning animals C. solve crimes D. help people recover their good

12、 health D.224. 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 ring Einstein back to life D. may have different characteristics from the original D.235. If we can be su

13、re that the embryo will not be wasted, _. A. cloning to obtain stem cells 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 controlled by a voluntary code of practice or government regulations D. cloning can be used t

14、o create animals and crops A.24 解码解码DNA 截取一段序列的基因截取一段序列的基因 3. 把它们插入宿主细胞把它们插入宿主细胞1. 4. 与与一样一样Unzip the DNACut out a sequence of genesInsert them into the host cellFind the expressionsP2-3be identical to.251. 正当的理由正当的理由2.可供选择的治疗方法可供选择的治疗方法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. 与与相立相立6.拥有新的缺点拥有新的缺点7.原有的美德原

15、有的美德valid reasonsan optional treatment unknown psychological pressurechoose a path in lifepossess new vicesexisting virtuesP4-5be contradictory to.26但是克隆出来的爱因斯坦选择的人生道路可但是克隆出来的爱因斯坦选择的人生道路可和和 “原版原版” 爱因斯坦的选择大相径庭。爱因斯坦的选择大相径庭。 But an Einstein clone might choose a path in life which is contradictory to th

16、e one the original Einstein chose._.Translation.271.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生物品种的 多样性多样性6.在犯罪现场在犯罪现场repair human tissuea prize cow依靠，依赖依靠，依赖restrict the biodiversityof the breed从疾病中康复从疾病中康复P6-8at a crime scene.28.29Debate cloningAre you for or against c

17、loning?“Cloning technology is a double-edged sword.”.30 赞成理由赞成理由1. 克隆技术可挽克隆技术可挽救濒危动物救濒危动物2. 可再造人体器可再造人体器官来移植，官来移植，为老人和病为老人和病人带来福音人带来福音3. .Homework :Write a composition Group 1 反对理由反对理由1.克隆容易造克隆容易造成各种基因的成各种基因的不良变异。不良变异。2. 克隆人的出克隆人的出现会使法律、现会使法律、伦理道德混乱。伦理道德混乱。3. Group 2Useful words变异变异 variation移植移植 transplant道德的道德的 ethic器官器官 organ对对.有利有利 be beneficial to 滥用滥用 abuse.31