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选修八Unit2 Reading


人教课标 高二 选修 8 Unit 2

Step1: Some basic knowledge about cloning
definition
types uses

problems

Step 1: 1. What is knowlege cloning? about Some basic cloning

It is a way of making an exact copy of another animal or plant. 1、What is cloning?
2、How many the types of cloning? (3 It happens both in plants when 、 What are the major uses of gardeners cloning? take cutting to make new plants and in animals when twins are 4、What were the problems of Dolly? produced from the same original egg. )

2、What are the types of cloning?
Cloning has two types, they are natural clones &man-made clones.

It’s the most famous
sheep in the world.

Dolly the sheep

3、What are the major ueses of cloning?
*Gardeners use it to produce commercial quantities of plants. ___________________________________. *It is valuable research on new plant species for________________________________

research on animals. and for medical ________________________

4、What happened to Dolly?
◆ Encouraging news: Dolly seemed to ____________________ develop normally ◆Disturbing news: Dolly lived only six and half the length of a half years,___________________the original sheep, because of serious illnesses which were more appropriate to a _____________ much older animals ____________________.

Step 2: The procedure of cloningHow did Dolly come into being? A D B C

It's your turn to finish this task now! Please work in groups and discuss with your partners.

D

9 the lamb(Dolly) 1 an egg cell

A
2 the nucleus is removed 2

D

1

B
4 a somatic cell

3 the egg cell without nucleaus

9、
8 the carrier

3

6 the egg cell and 8 、 the nucleus are C 4、 5 7、 joined 7 the embryo is but into C 、 6 5 the nucleus



step 3

Advantages? Disadvantages? Is cloning a good thing or a bad thing?
To clone or not to clone, it that the question?......

PK

tersx debaters

Which group is to be the top winner? Just wait and see!

Advantages:
1. produce commercial qualities of plants. 2. research on new plant species. 3.for medical reseach on animals. 4 .cure seious illness ( such as Paikinson's disease and Alzheimer's disease) 5.abundant medical aid 6.help infertile people have babies. 7. create great wealth to society. ......

Disadvantages:
1.very complecated, a difficult task 2.suffer illnesses and die at younger ages 3.evil leaders hope to clone themselves to attain their ambitions. 4.raise moral questions. 5.cause the spread of new diseases. 6.not a perfect technology, have many unknown results 7.......

自我评价
self-assessment
The things I can do(我学到一下内容) Evaluation(评分)

I can understand the reading text. I know what cloning is. I know how cloning procedure works. I know why cloning is a controversial problem. I can express some opinions( advantages & disadvantages) about cloning in my own words. I can write a short passage about cloning.

Y/N (1-5分) Y/N (1-5分) Y/N (1-5分) Y/N (1-5分) Y/N (1-5分)

Y/N (1-5分)



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