人教课标版高中英语选修8Unit2 Cloning warming up 课件（共33张）

课件33张PPT。Cloning:Where Is It Leading Us?Unit2 CloningSo, what is cloning? Cloning is the science of producing an animal or plant in a lab that is an exact copy of another using the original animal’s or plant’s DNA.In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ.DiscussionNatural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that produced through human intervention(介入) .A strawberry plantNatural cloneGrowing new plantsman-made cloneTwinsNatural cloneDolly the sheepShe was cloned while the others were born naturally. Dolly was a _____ sheep.clonedHow does Dolly differ from other sheep?man-made cloneHave you ever wished you could have a clone of yourself to do homework while you had a rest or went out with your friends? predictionWhat is the article about by reading this headline?Cloning: Where is it leading us?Fast reading What’s the text mainly about?It’s mainly about cloning arguments about animal cloning and concerns about its future.SkimmingRead the passage quickly, then try to find the main idea of each paragraph. 1.What is_____? 2.Cloning has _____ uses. 3.The _____ of Dolly. 4. The _____ of Dolly. 5. _____about human cloning and concerns about the _____ of cloning two major problems effectcloningArgumentsfuturescanningRead the passage carefully this time and answer the two questions1.Is it the same to make plant clones and animal clones? 2.What is the procedure of the cloning of Dolly the sheep?procedureCareful reading Read the text and choose he best answers.When was Dolly the sheep cloned? A. In 2006. B. In 2002. C. In 1996. D. In 1998.2. According to the procedure chart, _____ provided the nucleus for Dolly the sheep. A. Sheep A. B. Sheep B. C. Sheep C. D. None.BC3. Generally, an original sheep live _____ years old. A. 10 B. 12 C. 13 D. 6.5C4. It can be inferred from the passage that a cloned animal _____. A. usually lives as long as the original one B. usually lives longer than the original one C. usually dies earlier than the original one D. is usually as healthy as the original oneC5. Which of the following is wrong? A. Cloned people would live forever. B. Cloned people may be killed at will for medical aid. C. A woman would have difficulty recognizing her real husband. D. Men will die out because a woman can give birth to a baby without a husband.D6.The word “controversial” in para 4 probably means _____. A. complicated B. arguable C. importantIs cloning beneficial or harmful to us? Advantages VS. Disadvantages DiscussionProblems of cloningAnimal clones may develop the _____ of older animals. Animal clones may die _____ than the original animals. ___ _____may want to clone themselves. There are_____ objections to cloning human beings. Cloning is _____because scientist may create monsters by mistakes. illnessesyoungerEvil leaders moraldangerousCloning plants can be useful for research on ____ ___ ... ...