Unit 2 Cloning. Cloning is a way of making an exact _____ of another animal or plant. What is...
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Transcript of Unit 2 Cloning. Cloning is a way of making an exact _____ of another animal or plant. What is...
Unit 2 Cloning
Cloning is a way of making an exact _____ of another animal or plant.
What is Cloning? cop
y
______________ : is one that occurs in a natural form of cloning without human help.
__________________:is one that is
produced through human
intervention( 介入 ) .
Two kinds of clones
Warming up
Natural clone
Man-made clone
Look at these
pictures and discuss
which ones are natural clones and
which ones are man-made. Explain
how they differ.
Discussion
A strawberry
plant
_________clone
The new plants that grow from the runners (长匐茎植物) are exact copies of the o______( 原始的 ) plant.
Natural
riginal
Growing new
plants
___________ clone
Natural
Twins
They are born naturally and identical( 一模一样 )
in ____and ___________.
sex
appearance
_________clone
Natural
Dolly was a ______ sheep.cloned
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.
cloning Where is it leading us?
Book 8 unit 2
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
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
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.
主旨大意 Where is it leading us?
scanningReading
Cloning is a way of making an exact copy of another animal and plant.
1. What is cloning ?
2. It happens both in ______ and in_______. They are both _______
plantsanimals
Para 1 The definition of cloning
natural clones
1.The major uses: Firstly, …commercial… Secondly, …research…
Para 2 The major uses and procedures of cloning
2.In this paragraph,
the word “straightforward”
means ____.
A. uncomplicated B. honest
C. frank D. difficult
Cloning plants is straightforward while( 表对比 ) cloning animals is very complicated.
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
细枝末节Their determination and
patience of the scientists paid off.
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.
Para 3 The problems of Dolly
normallyencouraging
A. as long as B. shorter than C. longer than
disturbing
shorter than
4. The sheep that donated the
somatic cell most probably
lived ____ years.
A. 3 B. 6 C. 9 D. 13
推理判断
Altogether Dolly lived six and a half years, half the length of the life of the original sheep.
The word “controversial” in para.4 probably means :____________.
A. complicated
B. arguable
C. important
D. traditional
Para 4 The impact of Dolly
Its appearance raised and the media and public imagination.
a storm of objectionshad a great impact on
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.
Para 5 People’s reaction to cloning
some governments forbade research into human beings.
Further understanding
the author does not state a
ny personal opinion about cloning.
A. Objective (be fair)
B. Negative (be against it)
C. Positive (be in favor of it)
The writer’s attitude towards cloning
Because____________________________
_____________________________________
To Clone or not to clone ,that is a question.
Practice activity: Debate
Are you in favor of cloning or against cloning? State your point
of view on it.
VSFor Against
Advantage(good points) Disadvantage(bad points)
It can make more profits forgardeners and farmers
We could use cloning to cureillness
Cloning can help saveendangered animals
Cloning can provide a copy of a child for a couple whose child has died
Cloned animals is easy to get ill anddie
youngAgainst nature and moral
Animals clones may develop the illness ofolder
animalsEvil leaders may want toclone themselves
People are afraid that scientists will create thousands of copies of the same person.
Cloning is a great breakthrough to human beings
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 _____________________
Thank you Bye-bye