1. Cloning
Module 5

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

3. First cloned cat
First cloned horse

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

5. Vocabulary and Reading
--Cloning and DNA

6. 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

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

8. DNA
the fundamental component of life

9. enzyme
chemicals formed
in the body

10. Dolly 5
a clone
an organism which is genetically identical to another

11. Fast-reading
para 4—7
How many possible reasons for cloning are mentioned in the passage ?
Four

12. 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.

13. 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.

14. 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

15. 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

16. 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

17. 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.

18. Discussion
Is it right to clone human beings ？

19. Conclusion
Science is a two-edge sword.

20. Role-play

22. homework My View on Cloning
Surf the Internet to find more information about cloning and write a composition :
My View on Cloning

23. 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