cloning is a way of making an exact _____ of another animal or plant. what is cloning? copy
TRANSCRIPT
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.