《分生组织》PPT课件.ppt

BR,1.Out-of-class Research Project,2.Listen and Answer,3.Background Information,Clone,Before Reading,Genetic Engineering,Narcissus,Prometheus,Julius Robert Oppenheimer,Hiroshima,Nagasaki,BR（ORP）,Out-of-class Research Project,The research project should be assigned at the end of the previous unit.Students form groups to use library resources and Internet resources to get answers to the following questions.,1.What is cloning?2.Give a brief history of the scientific research into cloning.3.What are the major pros and cons of human cloning?4.During your research,what new vocabulary items have you come across that are related to cloning?,BR（LA1）,Listen and Answer,1.What does Prof.Greely think of human cloning?,We must distinguish different types of human cloning.Some are justified;others are not.,2.What is the greatest problem with human reproductive cloning?,Safety.,Listen to the interview and answer the following questions according to Prof.Greely.,BR(LA2),Listen and Answer,Listen to the interview and answer the following questions according to Prof.Greely.,3.What are the problems with a human clone?,There may be cell changes that are initially invisible and only show themselves as the clone ages.Theres also a problem with the ends of chromosomes in cells,which shorten until the cells can no longer reproduce.,BR（LA3）,4.In what situations can we use cloning?,Firstly,helping parents who are having difficulty having children would be one area.Secondly,parents want to create a new child to be a bone marrow donor for an older sick child.Another situation is cloning a child who has accidentally died.,Listen and Answer,Listen to the interview and answer the following questions according to Prof.Greely.,5.What about cloning a Hitler or Michael Jordan?,We can dismiss those as bad or even silly applications.,BR（LA4）,Listen and Answer,Listen to the interview and answer the following questions according to Prof.Greely.,6.Is there anything else about the future of human cloning?,Even if cloning humans were safe and we as a society had decided it was right and proper for reproductive purposes,I dont think wed see a lot of clones.The old-fashioned way of making babies has a lot going for it:Its easy,traditional,well understood,and occasionally even pleasant.,BR(LA5),Listen and Answer,Listen to the interview and answer the following questions according to Prof.Greely.,BR（C 1）,Clone,Clone is a group of organisms or cells that are genetically identical,having been produced from one parent by asexual reproduction.The individual organisms or cells are precise copies of the parent and genetically identical to it.Clones are found naturally among single-celled organisms(such as bacteria),a few invertebrates(such as corals),and some asexually reproducing plants(as in the production of runners by a strawberry plant).In agriculture,plant cloning can be used to advantage,in that individuals with desirable properties,such as pest-resistance or high growth rates,can be replicated exactly without the unpredictable results associated with sexual reproduction.,BR（C 2）,Artificial cloning of animals and cells can be achieved by teasing apart the cells of the early embryo.Similarly,cells capable of growing into mature plants can be obtained from plant growth-regions(meristems 分生组织).In genetic engineering cloning refers to the copying of DNA molecules.,Clone,BR（C3）,Clone,BR（C4）,Bacterial,BR（C5）,Invertebrates,BR（C6）,Corals,BR（C7）,Strawberry Plant,BR（C8）,Embryo,BR（C9）,DNA,BR（GE1）,Genetic Engineering,Genetic engineering is the deliberate modification of the genetic make-up(genome)of an organism by manipulation of its DNA.Genetic engineering techniques include cell fusion and the use of recombinant DNA(rDNA).Since the late 1960s these techniques have held out the most exciting promise for biotechnology.,BR（GE2）,In such a new field controversy inevitably abounds.Worries concerning release of genetically novel bacteria into the environment,or the possible manipulation of human embryos,have led to the setting up in the USA of the Genetic Manipulation Advisory Group(GMAG).Legislation governing genetic research has also been passed in several other countries.,Genetic Engineering,BR（Narcissus）,Narcissus,In Greek mythology,Narcissus is a beautiful youth who spurned(拒绝)the love of the nymph Echo and in punishment was made to fall in love with his own reflection;he pined away gazing at himself in a pool and at his death was changed into the flower bearing his name narcissus.,BR（Prometheus）,Prometheus,Listen to the passage and fill in the blanks with the missing words.,Prometheus is,in Greek mythology,a who made the first man from clay and stole from the gods to give to mankind.In for the theft,ZeusPrometheus to a rock,where his liver was eaten every day by an,only to grow again every night.Hercules eventually him.Prometheus has been seen as a symbol of,rebellion against tyranny,and of imagination.,Titan,_,fire,_,revenge,_,creative,_,chained,_,eagle,_,rescued,_,freedom,_,BR（JRO1）,Julius Robert Oppenheimer,Oppenheimer,(Julius)Robert(1904-1967)US physicist.,Click the words in blue to get more information!,BR（JRO2）,Julius Robert Oppenheimer,Julius Robert Oppenheimer(19041967)was a US physicist.He was appointed in 1942 as Director of the Manhattan Project,the secret project to develop the atomic bomb in the USA during World War II,based at Los Alamos,New Mexico,which in 1945 made the first atomic bomb.In 1953,at the height of the witch-hunting campaign led by the US Senator Joseph McCarthy,Oppenheimer was excluded from sensitive research on the grounds that he had Communist sympathies,but subsequently(1963)he was unreservedly rehabilitated.,BR（Hiroshima）,Hiroshima,Hiroshima is a Japanese city in southern Honshu.Hitherto largely undamaged by the US bombing campaign,Hiroshima became the target of the first atomic bomb attack on 6 August 1945,which resulted in the virtual obliteration of the city centre and the deaths of about one-third of the population of 300,000.The attack on Hiroshima,together with that on Nagasaki three days later,led directly to Japans unconditional surrender and the end of World War II.,BR（Nagasaki）,Nagasaki,Nagasaki is a Japanese city in Kyushu.On 9 August 1945,three days after the first atomic bomb attack on Hiroshima,Nagasaki became the next target.The hilly terrain protected the population of 230,000 from the full effects of the explosion,but 40,000 people were killed and tremendous destruction caused.On the following day Japan offered to surrender and the ceasefire began on 15 August,the official surrender finally being signed on 2 September.,GR,Global Reading,1.Part Division of the Text,2.Further Understanding,For Part 1,For Part 2,Role Play,Questions and Answers,Word-web,Group Discussion,For Part 3,Further Division,3.Text Analysis,Group Discussion,For Part 4 Scanning,GR（Part）,Part Division of the Text,Dolly the sheep,a clone,was born.,Dollys birth has made cloning a reality and human cloning a possibility.,People have to face the ethical problems of human cloning.,Cloning technology could benefit people in more than one way.,GR（RP）,Role Play,Make a telephone call between Ian Wilmut and John Bracken to describe Dollys birth(when,where,weight)and the corresponding response at that time.Pay attention to the tone the two take in the telephone conversation.,GR（QA1）,Scan the first three paragraphs and answer the following questions.,1.,2.,Does a tense change take place and whats it?,The first two paragraphs act as introduction to the whole essay.,Questions and Answers,What important role do beginning paragraphs play in journalistic writing?,GR（QA2）,Questions and Answers,3.,The text starts with the birth of Dolly,because it is a critical point in cloning research.Readers interest is further aroused by the low-key tone.Why no excitement,why no champagne,why were few people around?Readers are then ready to be told an objective account about human cloning.,Why didnt the author start from the very beginning of cloning research,but start with the birth of Dolly?,Scan the first three paragraphs and answer the following questions.,Find words and phrases related to the creation of Dolly in the 4th paragraph and describe it in your own words with the help of the list.,GR(WW),Word-web,Clone,union,remove,Dolly,out of,sheep,take up residence,grow,sperm,egg,udder cell,gene,another,fuse,original,identical twin,GR（GD1）,Group Discussion,1.In what way is it different from other lambs?2.What is the significance of Dollys birth?3.What did scientists think of cloning decades ago?4.Is human cloning possible now that Dolly was born?5.What is Wilmuts attitude toward the cloning of humans?,GR（FD）,Further Division,Further divide this part into two sections and get the main ideas.,79,1011,Human cloning has given rise to the question of what implications the technology may have for mankind.,The making of the atomic bomb had a tremendous impact on scientists.,GR（GD2）,1.What is the message Linda Pastans poem carries?2.What does the old joke indicate?3.What does the story of J.Robert Oppenheimer suggest?,Group Discussion,GR（sc）,Scan this part and list the benefits of human cloning,esp.in terms of medicine.,Scanning,GR（Text Analysis）,Text Analysis,Get the features of the text concerning the following points.,Style:,journalistic writing,Theme:,science and ethics,Introduction:,eye-catching,Tone:,objective,The“father”of Dolly is levelheaded about his achievement,so is the author.She quotes Wilmut and Oppenheimer to show how science can be a double-edged sword.Before listing the many benefits of human cloning in Part 4,she first identifies the ethical problems involved in Part 3.In her article she asks many questions,to which she gives no answer.If she said that there were definite answers,she would not be objective.,GR（Text Analysis）,Diction and Sentence Construction:,elaborate words,long and complex sentences and paragraphs,Article1_S,A CLONE IS BORN,On July 5,1996,at 5:00 p.m.,the most famous lamb in history entered the world.She was born in a shed,just down the road from the Roslin Institute in Roslin,Scotland,where she was created.And yet her creator,Ian Wilmut,a quiet,balding fifty-two-year-old embryologist,does not remember where he was when he heard that the lamb,named Dolly,was born.He does not even recall getting a telephone call from John Bracken,a scientist who had monitored the pregnancy of the sheep that gave birth to Dolly,saying that Dolly was alive and healthy and weighed 6.6 kilograms.,Article1_S-p,A CLONE IS BORN,On July 5,1996,at 5:00 p.m.,the most famous lamb in history entered the world.She was born in a shed,just down the road from the Roslin Institute in Roslin,Scotland,where she was created.And yet her creator,Ian Wilmut,a quiet,balding fifty-two-year-old embryologist,does not remember where he was when he heard that the lamb,named Dolly,was born.He does not even recall getting a telephone call from John Bracken,a scientist who had monitored the pregnancy of the sheep that gave birth to Dolly,saying that Dolly was alive and healthy and weighed 6.6 kilograms.,1.Analyze the structure of the subject.,Pay attention to the subject:her creator,Ian Wilmut,a quiet,balding fifty-two-year-old embryologist.Here her creator,Ian Wilmut and a quite,balding fifty-two-year-old embryologist are in apposition(同位关系).,2.Scan the text and find any other sentences with apposition.,LL.1415,LL.2123,LL.2526,etc.,3.What can you infer from the sentence?,Even the creator was indifferent to the birth of Dolly,so we can see the attitude of Wilmut towards cloning at the very beginning.From the low-key tone in the introduction and later on words said by Wilmut in the 6th paragraph we can also see that Wilmut was level-headed about his achievement.,Article1_w,A CLONE IS BORN,On July 5,1996,at 5:00 p.m.,the most famous lamb in history entered the world.She was born in a shed,just down the road from the Roslin Institute in Roslin,Scotland,where she was created.And yet her creator,Ian Wilmut,a quiet,balding fifty-two-year-old embryologist,does not remember where he was when he heard that the lamb,named Dolly,was born.He does not even recall getting a telephone call from John Bracken,a scientist who had monitored the pregnancy of the sheep that gave birth to Dolly,saying that Dolly was alive and healthy and weighed 6.6 kilograms.,Article1_w-clone,A CLONE IS BORN,On July 5,1996,at 5:00 p.m.,the most famous lamb in history entered the world.She was born in a shed,just down the road from the Roslin Institute in Roslin,Scotland,where she was created.And yet her creator,Ian Wilmut,a quiet,balding fifty-two-year-old embryologist,does not remember where he was when he heard that the lamb,named Dolly,was born.He does not even recall getting a telephone call from John Bracken,a scientist who had monitored the pregnancy of the sheep that gave birth to Dolly,saying that Dolly was alive and healthy and weighed 6.6 kilograms.,clone:,The idea of cloning extinct life forms still belongs to science fiction.,n.any of a group of plants or animals produced from the cells of a single ancestor and therefore exactly the same as it is,Researchers produced clones from adult mice in1998.,2.,v.make an exact copy of a plant or animal by taking a cell from it and developing it artificially,Although two clones are identical genetically,they may develop in different ways.,Experiments to try to clone human embryos have met with hostility from some sections of the public.,Article1_w-give birth to,A CLONE IS BORN,On July 5,1996,at 5:00 p.m.,the most famous lamb in history entered the world.She was born in a shed,just down the road from the Roslin Institute in Roslin,Scotland,where she was created.And yet her creator,Ian Wilmut,a quiet,balding fifty-two-year-old embryologist,does not remember where he was when he heard that the lamb,named Dolly,was born.He does not even recall getting a telephone call from John Bracken,a scientist who had monitored the pregnancy of the sheep that gave birth to Dolly,saying that Dolly was alive and healthy and weighed 6.6 kilograms.,give birth to:,1)bear(a child);bring forth,Too many mothers gave birth to babies in the year of 2000.,create;originate,2),These workers gave birth to a new political party.,They provided the weapons and gave birth to the Atomic Age.,Collocation：,赠送；泄露,give away,屈服，让步,give in,释放，放出,give off,分发,give out,放弃,give up,他们提供了武器并产生了原子时代。,Article2_S,No one broke open champagne.No one took pictures.Only a few staff members from the institute and a local veterinarian who attended the birth were present.Yet Dolly,who looked for all the world like hundreds of other lambs that dot the rolling hills of Scotland,was soon to change the world.,When the time comes to write the history of our age,this quiet birth,the creation of this little lamb,will stand out.The world is a different place now that she is born.Dolly is a clone.She was created not out of the union of a sperm and an egg