新人教版选修八 Unit 2 Cloning-Reading[课件]

Homework
Translate the procedure of cloning Dolly the sheep into Chinese.
A strawberry plant
The new plants that grow from the runners are exact copies of the original plant.
一株草莓依靠它沿地“爬走”的匍匐茎,一 年内就能长出数百株草莓苗
富贵竹插枝即活
The gardener should cut the plant ,then the cutting produce another new plant.
Twins
They are born naturally and identical in sex and appearance.
Para 3
The problems of Dolly
At first, the fact that Dolly developed encouraging ______ normally was __________. Later, the news _____she lived for six that and a half years, half the length of the disturbing life of the ______ one was __________. orginal Finally, the problem that occurred to the scientists was that a cloned animal lives shorter than _____________ the original one.
Advantages of cloning new _____ • Cloning plants can be useful for research on ____ plant species _______. quantities • Cloning plants can produce large ________ of plants for sale ____. medical • Cloning is valuable for ________ research on animals. cures • Medical cloning could produce _____for serious illnesses in humans. Problems of cloning illnesses • Animal clones may develop the _______ of older animals • Animal clones may die _______ than the original animals. younger Evil leaders • ___ _______may want to clone themselves. moral objections • There are_____ _________to cloning human beings.
Why is cloning controversial in some countries?
The writer’s attitude towards cloning
A. Objective (be fair) B. Negative (be against it) C. Positive (be in favor of it)
The impact（影响） of cloning Dolly
The problems of Dolly
The definition of cloning People’s reaction to cloning The major uses and procedures of clll you react when you find yourself cloned?
Discussion : Are you in favor of cloning or against cloning? State your point of view on it. For ＶＳ Against
Reading
With all the puzzles, let’s begin to
read the text.
Skim the passage and match each paragraph and its main idea. Para 1 Para 2 Para 3 Para 4 Para 5
the author does not state Because____________________________
any personal opinion about cloning. _____________________________________
Use the information from the text to fill in the chart about the advantages and disadvantages of cloning on Page 12.
Pre-reading
what do you understand about cloning?
1. What is a clone? 2. How is a clone produced? 3. What benefits can humans gain from cloning? 4. What problems may arise when humans are cloned?
The definition of cloning
What is cloning ?
Cloning is a way of making an exact copy of another animal and plant.
Para 2
The major uses and procedures of cloning 1.How many major uses do cloning have? What are they? Firstly, …commercial… Secondly, …research… 2. Why is it easier to make commercial plant clones than animal clones? Because cloning plants is straightforward , but the cloning of animals is very complicated. 3. When was the cloning of Dolly the sheep born? 1996
Warming Up & Reading
Warming Up
In pairs, look at these pictures and
discuss which ones are natural
clones and which ones are manmade.
A strawberry plant
Growing new plants
Twins
Dolly the sheep
How natural and man-made clones differ?
Natural clone is one that occurs in a natural form of cloning without human help. Man-made clone is one that produced through human intervention(介入) . When we refer to cloning, we usually mean man-made cloning.
2. The word “controversial” in para 4 probably means ____________. A. complicated B. arguable C. important
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 governments forbadebeings Many research into human will be forbidden. research into human beings. 3 Some countries will use cloning in a wise way.
as long as / shorter than / longer than
Para 4
The impact of Dolly
1. What impact does the appearance of dolly have?
It opened peoples’ eyes to the possibility of using cloning to cure serious illnesses and even to produce human beings.