1、 Cloning高二英语高二英语Book 8 Unit 2第一节第一节 Warming up and readingDolly (5 Jul. 1996 14 Feb. 2003)the worlds most famous sheep Dr. Ian Wilmut and DollyCloning is a way of making an exact copy of another animal or plant. It includes natural cloning and man-made cloning. What is cloning?What do you think of h
2、uman cloning?Whats your opinion of cloned food?Have you ever wished you could have a clone of yourself to do homework while you had a rest or went out with your friends? A clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same
3、 as it.What is a clone?Pre-readingHow is a clone produced?The cloning of plants is simple andrelatively easy. It can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). The cloning of animals is more complicated. It was not achieved until 199
4、6 and is fully explained in the first reading.What benefits can humans gainfrom cloning?Medical cloning can help cure serious illnesses that ruin ones quality of life.It can help infertile people have babies.What problems may arise when humans are cloned?People may want to clone themselves so they c
5、an live forever.People may want to clone dead children.People may want to clone their favourite pets.New words1.a somatic cell：体细胞：体细胞 This cell is taken from the skin of a mammal. It has the gens which can make a clone identical to the animal that donated the somatic cell. 2. a nucleus：细胞核：细胞核 a pa
6、rt of the cell containing DNA and RNA and responsible for growth and reproduction 3. an embryo：胚胎：胚胎 This is a bundle of growing cells which have not yet become a particular animal. All embryos look the same. Only later development turns them into cows, sheep or cats.in embryo 在酝酿；在酝酿；(考虑考虑/ 计划计划) 初
7、期初期; 萌芽时期萌芽时期Fast reading Whats the text mainly about?Its mainly about cloning arguments about animal cloning and concernsabout its future.Careful reading Read the text and choose he best answers.1.When was Dolly the sheep cloned? A. In 2006. B. In 2002. C. In 1996. D. In 1998.2. According to the pr
8、ocedure chart, _ provided the nucleus for Dolly the sheep. A. Sheep A. B. Sheep B. C. Sheep C. D. None.CC3. 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 l
9、ives 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 not an advantage of cloning? A. Cloning can be used for medical purposes. B. Large quantities of food can be produced by cloning. C. Cloning can h
10、elp keep animals from becoming extinct. D. Famous persons who have passed away can be cloned.D6. 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 di
11、e out because a woman can give birth to a baby without a husband.DNew expressions1. Dollys illnesses were more appropriate to a much older animal. The underlined words indicate that Dollys illness were what one would expect to find in an older animal. In other words a young animal, like Dolly, shoul
12、d not have become ill with these diseases until she was much older.2. the same arbitrary fate This phrase means that the mice and Dolly the sheep had no choice but to die young. No one imagined that this would happen and so no one could prevent it.Is cloning beneficial or harmful to us? Advantages V
13、S. Disadvantages Discussion Group workSituation: Imagine youre interviewing a famous scientist about their opinions of cloning. Do you think it is wise to ?Whats your opinion of ? I think you should I agree with you that I would never accept 1. Surf the Internet for more about cloning;2. Review the text and pick out the difficult language points;Homework3. WritingBackground: A man has just lost his left hand, one day his friend tells him the news that a doctor can transplant one new hand for him . Continue with the story.
