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Cloning Module 5 What animals have been cloned ? Dolly First cloned mule Cloned monkeys First cloned horse First cloned cat Free talk 1.What is cloning ? 2.How can we clone something? Before Reading Read these words and decide which ones you are likely to see in the passage. (possibly) acid bacteria embryos enzyme experience gene human tissue organism plant psychological stem cell structure upbringing • • • • para 1—3 Fast-reading 1. DNA ? 2. Enzyme ? 3. A clone ? DNA the fundamental component of life enzyme chemicals formed in the body Dolly 5 a clone an organism which is genetically identical to another Fast-reading para 4—7 • • How many possible reasons for cloning are mentioned in the passage ? Four Para 1 Careful-reading • 1. who discovered the structure of 1953 Watson and Crick DNA? When ? • He understood that both the parent plants had influenced the genetic make-up of the 2. What did Mendel understand in new plant. 1866 ? Para 2&3 Careful-reading Unzip the DNA • Find the expressions Cut out a sequence of 1. 解码DNA genes Insert them into the hos 2. 截取一段序列的基因 cell How can we clone something ? 3. 3. 把它们插入宿主细胞 Cloning takes the DNA from a single cell to creat a whole individule. Para 4&5 Careful-reading Find the expressions 1. 正当的理由 2. 可供选择的治疗 方法 3. 未知的心理压力 4. 选择人生道路 5. 拥有新的缺点 6. 原有的美德 valid reasons an optional treatment unknown psychological pressure choose a path in life possess new vices existing virtues Valid reasons (advantages) As an optional Disadvantages treatment for couples who find it difficult to have children A clone would be under unknown psychological pressure reproduce the talents of exceptional people A clone may possess new vices instead of existing virtues Para 6--8 Careful-reading Explain the expressions 1. recover from a 从疾病中康复 disease repair human tissue 2. 修复人体组织 a price cow 3. 一只优选奶牛 依靠,依赖 4. rely on 5. 限制生物品种的 restrict the biodiversity 多样性 of the breed 6. at a crime scene 在犯罪现场 Valid reasons (advantages) To obtain a supply of stem cells To help farmers grow resistant crops. Disadvantages Embryos made from clones would be wasted which some people would find unacceptable. To rely on a few cloned animals or crops would restrict biodiversity Discussion Is it right to clone human beings ? Conclusion Science is a two-edge sword. Role-play homework Surf the Internet to find more information about cloning and write a composition : My View on Cloning Tips You can write as follows: 1. Are you for or against cloning? 2. Give your reasons. Use these words: “firstly… secondly… lastly” 3. Give examples to support your idea. You can see the example on P 66