Cloning Module 5

What animals have been cloned ? Dolly Cloned monkeys First cloned mule

First cloned cat First cloned horse

Free talk 1.What is cloning ? 2.How can we clone something?

Vocabulary and Reading --Cloning and DNA

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

1. DNA ? 2. Enzyme ? 3. A clone ？ Fast-reading para 1—3

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

Careful-reading Para 1 1. who discovered the structure of DNA? When ? 2. What did Mendel understand in 1866 ？ 1953 Watson and Crick He understood that both the parent plants had influenced the genetic make-up of the new plant.

Careful-reading Para 2&3 Find the expressions 解码DNA 截取一段序列的基因 Unzip the DNA Find the expressions 解码DNA 截取一段序列的基因 3. 把它们插入宿主细胞 Cut out a sequence of genes Insert them into the host cell How can we clone something ? Cloning takes the DNA from a single cell to creat a whole individule.

Careful-reading Para 4&5 正当的理由 可供选择的治疗方法 未知的心理压力 选择人生道路 拥有新的缺点 原有的美德 Find the expressions 正当的理由 可供选择的治疗方法 未知的心理压力 选择人生道路 拥有新的缺点 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) Disadvantages As an optional treatment for couples who find it difficult to have children A clone would be under unknown psychological pressure A clone may possess new vices instead of existing virtues reproduce the talents of exceptional people

Careful-reading Para 6--8 修复人体组织 一只优选奶牛 rely on 限制生物品种的 多样性 Explain the expressions recover from a disease 修复人体组织 一只优选奶牛 rely on 限制生物品种的 多样性 at a crime scene 从疾病中康复 repair human tissue a price cow 依靠，依赖 restrict the biodiversity of the breed 在犯罪现场

Valid reasons (advantages) Disadvantages Embryos made from clones would be wasted which some people would find unacceptable. To obtain a supply of stem cells To rely on a few cloned animals or crops would restrict biodiversity To help farmers grow resistant crops.

Discussion Is it right to clone human beings ？

Conclusion Science is a two-edge sword.

Role-play

homework My View on Cloning 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