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1、Period2 Cloning :where is it leading us?導(dǎo)學(xué)案（二） 一. 學(xué)習(xí)目標(biāo)： 1. To learn about some facts and views about cloning. 2. To develop the Ss' reading ability by skimming and scanning the passage. 二. 重點(diǎn)難點(diǎn)： To develop the Ss' reading ability by skimming and scanning the passage. To enable the Ss to learn

2、about cloning and to develop their reading ability. To enable the Ss to talk about what we should do to deal with cloning properly. 三.預(yù)習(xí)自測： Fast -reading 1 .What is cloning ? 2. What is the writing style? A. Expositive （說明性的）. B. Descriptive. C. Argumentative （議論性的）. 3. Can you put the topic

3、sentences into paragraphs that they belong to? （Attention: one of them belongs to nowhere.） Para 1 ① Dolly's problem and death Para 2 ②What is cloning? Para 3 ③ Two major uses of cloning Para4 ④ Arguments brought by Dolly Para5 @The procedure for human cloning ⑥ The effect of Dolly 四.合作探究：

4、探究一：Second reading l. What are the two major uses of cloning ? 2. Is cloning plants the same with cloning animals ? 3. Give a right order（順序）of cloning Dolly's procedure （過程） ① The cell divides and grows into an embryo. ② The lamb is the clone of the donated cell from Sheep B. （3） A nucleus is

5、 taken out of Sheep B's somatic cell. ④ The embryo is put into female Sheep C. ⑤ The egg cell from Sheep A and the nucleus from Sheep B are joinedusingelectricity. ⑥ The egg cell from Sheep A is removed a nucleus. The order: 探究二：Third reading l. True or False questions. ① Dolly the sheep was

6、 the first successful clone of a mammal.（ ） ② Some countries like China didn' t stop human cloning research.（ ） ③ a cloned animal usually dies earlier than the original one.( ) ?Evil leaders can clone themselves to abtain their ambitions.( ) 2. What is the writer's attitude(態(tài)度)toward cloning in

7、 this passage? A. The writer is against cloning.B. The writer is in favor of cloning. C. The writer does not state any personal opinion about cloning. 3. What' s the affect of cloning ? On the one hand ,it opened everybody' s eyes to the of using cloning to cure and even produce ; On the other

8、hand , Its appearance raised a storm of and had a great impact_on the and public . 五.當(dāng)堂檢測：What are the advantages and disadvantages of cloning ? advantages 1 .Cloning plants can produce of plants . 2. Cloning plants can be useful for research on new species. 3. Medical cloning could produce

9、for serious illnesses. disadvantages 1. Animal clones may develop the of older animals. 2. Animal clones may younger than the donor animals. 3. Evil leaders may want to themselves to attain their ambitions. 4. Religious leaders raised questions about human cloning. 六：總結(jié)提升： The writer's point

10、of view in this reading passage is because In a word, As a coin has two sides, everything has two aspects. Cloning also has advantages and disadvantages. So we should use the technology of cloning correctly. Homework:. Read the text carefully after class and underline the useful expressions in the passage and learn them by heart.