《高中英语 Unit 2 Cloning Warming Up多媒体教学优质课件 北师大版选修8》由会员分享，可在线阅读，更多相关《高中英语 Unit 2 Cloning Warming Up多媒体教学优质课件 北师大版选修8（36页珍藏版）》请在金锄头文库上搜索。
1、 Unit 2 CloningWarming Up & Reading ()1.Talk about cloning.2.Practice expressing and supporting an opinion . 3.Enable the students to know some laws about cloning . Look at these pictures and discuss which ones are natural clones and which ones are man-made. Think about how they differ.The plant pro
2、duces its own runners.A strawberry plantA stem Take cuttingscuttings from growing plants to make new ones. They are identical in sex and appearance, who are produced from the same original egg. She was c_ while the others were born naturally. It is the exact copy of another sheep and the first clone
3、d mammal. lonedDolly the sheepIts name is Andi, the first genetically modified monkey.Dog Snuppy was created by Korean and American scientists.copy【Warming Up 】WHAT IS THE DIFFERENCE AMONG THEM ?Natural cloneMan-made cloneclone Clone, also called reproduce asexually (无性生殖无性生殖 /繁繁殖殖), is the creation
4、 of cells or whole animals using DNA from a single “parent”, without using the normal reproductive (有性生殖有性生殖) process. The clone has the exactly same DNA to the parent. It includes natural and man-made clone.? ? 1.What do you think the article is about by reading this headline? Step 1. Pre-reading【R
5、eading 】STEP 2. FAST-READING1. What is the writing style?A. Expositive(说明文说明文). B. Descriptive(记叙文记叙文).C. Argumentative(议论文议论文).2.What is the main idea of the passage?The passage tells us that animal cloning raisedraised _ and scientists are not sure about its _.argumentsfuture_.Cloning has two majo
6、r uses and successful clone._.Cloning is a way of making an exact copy of another animal and plant .(definition)_. The effect of Dolly._. It is forbidden to clone human beings._.The problems of Dolly.123453.Read the text fast to give the right order of the main idea of each paragraph.True or false :
7、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.TFTFStep 3. Careful-readingWhich of the following statements about cloning is NOTNOT TRUETRUE according to te
8、xt? A. Cloning is something that has been 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.The cloning of Dolly the sheep succeeded because_. A
9、. its easier to clone a sheep than other animals B. the scientists were determined and worked hard with patienceC. the scientists were rewarded and got lots of moneyD. many other attempts to clone mammals failed.The determination and patience of the scientists was rewarded/ paid off. DefinitionIt is
10、 a way of _ of another animal and plant.2 major uses of cloning1)to produce _quantities of plants. 2)It is valuable for research on new _and medical research on _. making an exact copycommercialplant speciesanimalsCloning procedureCloning plants is _while cloning animals is very _.The first successf
11、ul animal cloneThe cloning of_, a _ in cloning tech.straightforwardbreakthroughDolly the sheepcomplicatedThe problems of Dolly the sheep Encouraging news : It seemed to develop _ and produced _in a _way. Disturbing news:It lived for _ and a half years, half the length of the life of the _ sheep. nor
12、mallynatural6originala lambThe effect of Dolly the sheepIts appearance raised a storm of _ and had a great impact on the _ and public_. It opened everybodys eyes to the possibility of using cloning to cure _and even to produce _.objectionshuman beingsimaginationserious illnessesmediaArguments on clo
13、ningEvil leaders hope to clone _. Religious leaders raised _ questions.Many governments _ research into human cloning. Some countries continued to _.evidence of the abundant medical aid.moralforbadethemselvesaccumulate冒死也要克隆人的法国科学家冒死也要克隆人的法国科学家:布瓦瑟利耶布瓦瑟利耶Step 4. Further-reading恐怖分子头目本拉登恐怖分子头目本拉登The
14、10-month-old girl, Kinder died in an accident in America, clone can produce an exact girl of her.Clone can make a woman who cant get pregnant(怀孕怀孕的）的） have a child.At present our country lacks organs(器官器官). The cloned man can transform his organs to his original one(本体本体)Our cloning technology is no
15、t perfect. Some cloned babies have deformity(畸形）畸形）from birth.Cloning is valuable for _ research on animals. medicalAdvantages of cloningMedical cloning could produce _for serious illnesses in humans.curesCloning plants can produce large _ of plants for _.quantitiesCloning plants can be useful for r
16、esearch on _ _ _.speciesplantsalenewProblems of cloningAnimal clones may develop the _ of older animals.illnessesAnimal clones may die _ than the original animals.younger_ _ may want to clone themselves.There are _ _to cloning human beings.Evil leaders moralobjections1.We can conclude _A. cloning is
17、 good for us.B. cloning has two aspects.C. if cloning is used in a correct way it can bring many convenience to us.D. if cloning is used in an evil way it can cause much trouble.As a coin has two sides, everything has two aspects. On one hand, if cloning is used in a correct way it can bring many co
18、nvenience to us. On the other hand, if cloning is used in an evil way it can cause much trouble. Therefore, we should use cloning in a correct way.2.Why should we use cloning in a wise way ?DEBATE: WHAT IS YOUR OPINION OF CLONING? ARE YOU IN FAVOR OF IT OR AGAINST IT?HomeworkAll things in their being are good for something. 天生我才必有用。天生我才必有用。
