Transcript Man-made clone

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natural clone
clone
man-made clone
Natural clone is one that occurs
from the “parent ” in a natural
form of cloning without human
help.
Man-made clone is one that
produced through human
intervention(介入) .
natural cloning examples
cactus
pendulum orchid
(吊兰)
natural cloning examples
strawberry
twins
man-made cloning examples
the first cloned cat
Dolly the sheep
In 1996, a sheep called Dolly
was born. It is the first
mammal to be cloned. It is
considered to be the greatest
success in the development
of cloning.
She was cloned while the
others were born naturally.
Reading
Task 1
Read the passage
and find out the main
idea of each paragraph
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5
Cloning has two major uses.
Cloning is a way of making an
exact copy of another animal
and plant .
It is forbidden to clone human
being.
The effect of Dolly
The problems of Dolly.
Reading
Task 2 Detailed Reading
What are the two major uses of
cloning?
Read the paragraph
2 and answer the two
questions.
Firstly, gardeners use it all the time
to produce commercial quantities
of plants.
S e c o n d l y, i t i s v a l u a b l e f o r
research on new plant species and
for medical research on animals.
Why is it easier to make
commercial plant clones than
animal clones?
Cloning plants is straightforward
w hile cloning ani mal s is ver y
complicated
Reading
Task 3
1. Four female sheep participate
in the cloning of a new sheep.
2. Electricity is needed in the
procedure. T
F
Read the 9
sentences below the 3. Sheep B provides a somatic cell
picture and get
for the clone. T
familiar with the
4. The lamb is the exact copy of
procedure of cloning
the sheep which provides egg
cell.
F
The procedure of cloning Dolly the sheep
Reading
Task 4
1. What was the first clone
from an adult animal?
Read paragraph 3, try to
get some information
about Dolly the sheep after
your reading, then answer
the questions on the
screen with your book
closed
Dolly the sheep
2. At what age did this clone
die?
She was six and a half years old
3. Did she develop the illness
of older animals?
Yes, she became seriouly ill.
4. Which one can live longer,
clone ones or ordinary ones?
Ordinary ones.
Comprehending
Go through paragraph four and
five, try to find out the
advantages and disadvantages of
cloning
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using cloning to cure serious illnesses
help save endangered animals
Advantages
produce plants of similar quality for sale
cloning plants can be useful for research
on new plant species
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evil leaders hoping to clone themselves
religious leaders raised moral
Disadvantages
questions
animal clones may develop the illness
of older animals
animal clones may die younger than
donor animals
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Express your ideas
Are you in favor of cloning or against cloning?
State your point of view on it.
cloning
Advantages
1 using cloning to cure
serious illnesses
2 help save endangered
animals
3 produce plants of
Disadvantages
1
evil leaders hoping to
clone themselves to
attain their ambitions
2
3
similar quality for sale
4
4
religious leaders raised
moral questions
animal clones may
develop the illness of
older animals
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.