Cloning is a way of making an exact _____ of another animal or plant.

What is Cloning? cop

y

What is the difference among them ?

Natural clone

Man-made cloneclone

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 ) .

Dolly the sheep

She was cloned while the others were born naturally.

Dolly was a ______ sheep.cloned

How does Dolly differ from other sheep?

Skim the following passage and match the paragraph with the correct sentence.

Para 1 A. The problems of Dolly

Para 2 B. The two major uses of

cloning

Para 3 C. The attitudes towards

cloning

Para 4 D. The definition of cloning

Para 5 E. The effect of cloning in

society

Cloning is a way of making an exact copy of another animal and plant.

What is cloning ?

It happens both in ______ and in_______. They can be cloned by ________ and _______.

plantsanimalsthemselves humans

Natural clone Man-made clone

Para 1 The definition of cloning

1.How many major uses do cloning have? Firstly, …commercial… Secondly, …research…

2. When was the cloning of Dolly the sheep born?

Para 2

1996

The major uses and procedures of cloning

At first, the fact that Dolly developed ______ in a natural way was __________.

Later, the news _____she lived for six years, half the length of the life of the ______ one was __________.

Finally, the problem that occurred to the scientists was that a cloned animal lives_____________ the original one.

Para 3 The problems of Dollynormally

encouraging

orginal

that

as long as / shorter than / longer than

disturbing

shorter than

The word “controversial” in paragraph 4 probably means ____________. A. complicated B. arguable C. important

Para 4 The impact of Dolly

True or false:

1 People feared that Cloned Hitlers 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

Many governments forbade reserch into human beings.

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____________________________

_____________________________________

The important events

in animal cloning

history

2001 cloning cattle

2003 Cloning horse2002 cloning rabbits

2002 cloning cats

1. The main idea of the text is____. A. animal cloning is very valuable and can

benefit the world. B. animal cloning is well developed because

Dolly the sheep was born. C. animal cloning could be misused by bad

people so it must be forbidden D. animal cloning raised arguments and

scientists are not sure about its future.

2. It can be inferred from the passage

that a cloned animal_____ the original

one.

A. usually lives as long as

B. usually lives longer than

C. usually dies earlier than

D. is usually as healthy as

3. In the second paragraph, the word

“straightforward” means ______.

A.uncomplicated

B.honest

C.frank

D.difficult

4. We can infer from the last three paragraphs that ______.

A.Dolly’s serious disease and final death disturbed the whole world.

B.Dolly successfully cloned a new lamb with the help of cloning scientist

C.the normal development of Dolly had no effect on the cloning of other species

D.there were arguments about animal cloning and concerns about the future of cloning

5. What is the writer’s attitude toward cloning

in this passage?

A.The writer is against cloning.

B.The writer is in favor of cloning.

C.The writer is in agreement with cloning.

D.The writer does not state any personal

opinion about cloning.

6.Dolly the sheep______.

A. looked exactly like the sheep that provides the egg

B. was the exact copy of the sheep that provides the nucleus

C. looked like the sheep that gave birth to it

D. had the characteristics of all three sheep

7.The sheep that donated the somatic cell most probably lived ________years.

A. 3 B. 6 C. 9 D. 13

8. Which of the following is not an advantage of cloning?

A.Cloning can be used for medicine purposes.

B.Large quantities of food can be produced by cloning.

C.Cloning can help keep animals from becoming extinct.

D.Famous person who have passed away can be cloned.

9.Which of the following statements about cloning is

NOT trueNOT true according to text?

A. Cloning is something that has been developed quite

recently.

B. Twins that look exactly the same are originally from

the same egg.

C. Cloning is used by gardeners to make more money.

D. Animal cloning is much more difficult than plant

cloning.

10.The cloning of Dolly the sheep succeeded because____. A. its 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

The determination and patience of the scientists was rewarded/ paid off.

True of false :

1.Four female sheep participate in the cloning of a new sheep.

2.Electricity is needed in the procedure.

3.Sheep B provides a somatic cell for the clone.

4.The lamb is the exact copy of sheep A.

(F)

（ T）（ F）

(T)

5.Cloning means making a copy of an animal or a plant.

6.Gardeners can make a lot of money by cloning plants. ( )

7.Cloning animals is as complicated as cloning plants. ( F )

8.Dolly the sheep was the first successful clone of a mammal. ( )

9.Natural clones happen in animals as well as in plants. ( )

（ F）

T

T

T

Problems /dangers of cloning Advantages of cloningAnimal clones may develop the illnesses of older animals.

Medical cloning could produce cures for serious degenerative illnesses in humans.

Animal clones may die younger than the donor animals.

Cloning plants can produce plants of similar quality for sale.

Evil leaders may want to clone themselves.

Cloning plants can be useful for research on new plant species.

There are moral objections to cloning human beings.

Cloning can help save endangered animals.

Fill in the chart using the information from the text.

Definition

2 major uses of cloning

Cloning procedureThe first

successful animal clone

It is a way of __________________ of another animal and plant.1)to produce ___________quantities quantities of plants .of plants . 2)It is valuable for research on new ______________and medical research on ________. Cloning plants ______________while cloning of animals is ___________The cloning of_______________, a _____________ in cloning tech.

making an exact copy

commercial

straightforward

breakthrough

plants species

animals

Dolly the sheepcomplicated

As a coin has two sides, everything has

two aspects. On one hand, if cloning is

used in a correct way it can bring many

convenience to us. On the other hand, if

cloning is used in an evil way it can

cause much trouble. Therefore, we

should use cloning in a correct way.

Homework

Write a short passage about the advantages and disadvantages of cloning. At the end of your passage ,you can add your own opinion.