Warming.ppt

1、高二人教新课标版选修八,Unit 2 Cloning,Warming Up,These two lovely girls are _.,A. twins B. cloned,A,Clone?,Natural clone,Man-made clone,Natural clone is one that occurs from the “parent” in a natural form of cloning without human help.,Man-made clone is one produced through human intervention (介入) .,natural cl

2、ones,natural clones,man-made clones,cloned animals,Dolly and its creator,第一只克隆宠物猫,cloned rabbit,克隆的荧光小猪(左)和 正常小猪(右),克隆马及其 “母亲兼姐姐”,The worlds first cloned mule (驴), was born on May 4. He is created from a cell of his brother.,The worlds first cloned cat, kitten, named Cc. It was created using a cell

3、taken from an adult cat, Rainbow.,In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Think about how they differ.,Its the most famous sheep in the world. Do you know how Dolly is different from other sheep?,She was cloned while the others were bor

4、n naturally. It is the copy of another sheep.,2. What can you see in the second picture?,A strawberry plant producing runners in a natural form of cloning.,3. Who cut off the stem of the plant?,A gardener. And the gardener is going to put it into a pot to produce another plant.,4. What do you know a

5、bout twins?,There are twins of the same sex and those of different sexes. The twins here are identical in sex and appearance and are good examples of natural clones. They carry the same genetic information.,Are the following clones the same? If not, what is the difference?,NO. Dolly is an example of

6、 man-made clone. The twins are natural clones.,The advanced technique in genetics (遗传学) with which scientists can create or copy things with the same DNA.,What is a clone?,Discussion,Scientific Definition,Cloning is the creation of cells or whole animals by using DNA from a single “parent”, not with

7、 the normal reproductive process. The clone has the same DNA to the “parent”.,How is a clone produced?,Problems or dangers of cloning,Animal clones may develop the illnesses of older animals.,Animal clones may die younger than the donor animals.,Evil leaders may want to clone themselves.,There are m

8、oral objections to cloning human beings.,Advantages of cloning,Medical cloning could produce cures for serious illnesses in humans.,Cloning plants can produce plants of similar quality for sale.,Cloning plants can be useful for research on new plant species.,Cloning can help save endangered animals.

9、,True or False,Cloning means making a copy of an animal or a plant. 2. Gardeners can make a lot of money by cloning plants. 3. Cloning animals is as complicated as cloning plants. 4. Dolly the sheep was the first successful clone of a mammal. 5. Natural clones happen in animals as well as in plants.

10、,F,F,T,T,T,Oh! My God! I was cloned!,Is it good cloning people?,1. differ vi. In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ. 两人一组, 观察图片并讨论哪些是自然无性 繁殖, 哪些是人工的。解释它们的区别。 differ ( vi.), 主要有两个义项: “不同, 相异； 不同意, 意见相左”。常见的搭配有:,

11、New Words,1) sb. differ from/with sb. on/upon/about sth. : 某人与某人在方面意见不同 2) sth. and sth. differ in : 某物与某物在 方面不同 3) sth. differ from sth. : 某物与某物不同 difference n. 不同 different adj. 不同的 Chinese differs greatly from English in pronunciation. 汉语与英语在发音上有很大的不同。,Modern airplanes differ from early ones. 现代飞

12、机跟早期的在很多方面有所不同。 I differ with him how to solve the problem. 对于如何解决问题，我跟他的意见不一致。,They differ with each other on moral standards. 关于道德标准，他们的见解不同。 The boy differs from his mother in character. 这个小男孩在性格方面不同于他的母亲。,1) We differ _ him _ that question. 2) The two nations differ _ culture and religion. 3) The cl