1. Unit 2 Cloning

3. Cloning is a way of making an exact _____ of another animal or plant.
What is
Cloning?
copy

4. Warming up
Two kinds of clones
______________：is one
that occurs in a natural form of cloning without human help.
Natural clone
Man-made clone
__________________:is one that is
produced through human
intervention(介入) .

5. Discussion Look at these pictures and discuss
which ones are natural clones and which ones are man-made. Explain how they differ.

6. A strawberry plant
_________clone
Natural
The new plants that grow from the runners （长匐茎植物）are exact copies of the o______(原始的) plant.
riginal

7. Growing new plants
___________
clone
Natural

8. naturally and identical(一模一样)
Twins
_________clone
Natural
They are born
naturally and identical(一模一样)
in ____and
___________.
sex
appearance

9. Dolly was a ______ sheep.
The sheep Dolly
In 1996, Dolly was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning.
cloned
Dolly was a ______ sheep.

10. cloning
Where is it leading us?
Book 8 unit 2

11. A. The impact of Dolly.
B. Cloning is a way of making an exact copy of another animal and plant.
C. People’s reaction to cloning.
D. Cloning has two major uses.
E. The problems of Dolly.
Paragraph1
Paragraph2
Paragraph3
Paragraph4
Paragraph5

12. The main idea of each paragraph.
A. The impact of Dolly.
B. Cloning is a way of making an exact copy of another animal and plant.
C. People’s reaction to cloning.
D. Cloning has two major uses.
E. The problems of Dolly.
Paragraph1
Paragraph2
Paragraph3
Paragraph4
Paragraph5

13. 主旨大意 Where is it leading us? The main idea of the text is____
A. animal cloning is very valuable and can benefit the world.
B. animal cloning could be misused by bad people so it must be forbidden
C. animal cloning is well developed because Dolly the sheep was born.
D. animal cloning raised arguments and scientists are not sure about its future.

14. Reading
scanning

15. 2. It happens both in ______ and in_______. They are both _______
Para 1 The definition of cloning
1. What is cloning ?
Cloning is a way of making an exact copy of another animal and plant.
2. It happens both in ______ and in_______. They are both _______
plants
animals
natural clones

16. The major uses and procedures of cloning
Para 2
The major uses and procedures of cloning
1.The major uses:
Firstly, …commercial…
Secondly, …research…
Cloning plants is
straightforward
while(表对比) cloning
animals
is very complicated.
2.In this paragraph,
the word “straightforward”
means ____.
A. uncomplicated B. honest C. frank D. difficult

17. Their determination and patience of the scientists paid off.
细枝末节
Their determination and patience of the scientists paid off.
The cloning of Dolly the sheep succeeded because____ A. it’s easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience
C. the scientists were rewarded and got lots of money
D. many other attempts to clone mammals failed

19. The problems of Dolly Para 3
First, the fact that Dolly developed ______ in a natural way was __________.
Later, the news that Dolly had become seriously ill was __________.
Finally, the problem that occurred to the scientists was that a cloned animal lives_____________ the original one.
normally
encouraging
disturbing
shorter than
A. as long as B. shorter than C. longer than

20. 推理判断
4. The sheep that donated the somatic cell most probably lived ____ years.
A B C D. 13
Altogether Dolly lived six and a half years, half the length of the life of the original sheep.

21. The impact of Dolly Para 4
Its appearance raised and the media and public imagination.
a storm of objections
had a great impact on
The word “controversial” in para.4 probably means :____________.
A. complicated
B. arguable
C. important
D. traditional

22. People’s reaction to cloning
Para 5
People’s reaction to cloning
True or false:
1. People feared that Cloned
evil leaders would do harm to the
world.
2 All the research into human beings will be forbidden.
3 Some countries will use cloning in a wise way.
some governments forbade research into human beings.

23. Further understanding

24. B. Negative (be against it) C. Positive (be in favor of it)
The writer’s attitude towards cloning
A. Objective (be fair)
B. Negative (be against it)
C. Positive (be in favor of it)
Because_________________________________________________________________
the author does not state any personal opinion about cloning.

25. To Clone or not to clone，that is a question.

26. Practice activity: Debate
Are you in favor of cloning or against cloning? State your point of view on it.
For ＶＳ
Against

27. Advantage(good points) Disadvantage(bad points)
Cloning is a great breakthrough to human beings
Cloned animals is easy to get ill and
die young
It can make more profits for
Against nature and moral
gardeners and farmers
We could use cloning to cure
Animals clones may develop the illness of
illness
older animals
Cloning can help save
Evil leaders may want to
endangered animals
clone themselves
People are afraid that scientists will create thousands of copies of the same person.
Cloning can provide a copy of a child for a couple
whose child has died

28. However,________________________________________________________
Homework : 基础写作
写作情景：今天我们班同学讨论了有关克隆的问题。同学们热烈发表了评论和表达了自己的看法；他们主要有两种不同的意见：
写作内容：
请同学们将辩论的内容整理成一篇作文。
开头已给出。
Today ,we have a heated discussion about cloning and opinions are divided on the question. _______________________________________
However,________________________________________________________
personally, I _____________________

29. Thank you
Bye-bye