课件33张PPT。Cloning:Where Is It Leading Us?Unit2 CloningSo, what is cloning? Cloning is the science of producing
an animal or plant in a lab that is an
exact copy of another using the original
animal’s or plant’s DNA.In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ.DiscussionNatural 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) .A strawberry plantNatural cloneGrowing new plantsman-made cloneTwinsNatural cloneDolly the sheepShe was cloned while the others were born naturally.
Dolly was a ______ sheep.clonedHow does Dolly differ from other sheep?man-made cloneHave you ever wished you could have a clone of yourself to do homework while you had a rest or went out with your friends? predictionWhat is the article about by reading this headline?Cloning: Where is it leading us?Fast reading What’s the text mainly about?It’s mainly about cloning arguments about animal cloning and concerns
about its future.SkimmingRead the passage quickly, then try to find the
main idea of each paragraph.
1.What is______________?
2.Cloning has ____________ uses.
3.The _________ of Dolly.
4. The ________ of Dolly.
5. _________about human cloning and concerns
about the _______ of cloning
two major problems effectcloningArgumentsfuturescanningRead the passage carefully this time and answer the two questions1.Is it the same to make plant clones and
animal clones?
2.What is the procedure of the cloning of
Dolly the sheep?procedureCareful reading Read the text and choose he best answers.When was Dolly the sheep cloned?
A. In 2006. B. In 2002.
C. In 1996. D. In 1998.2. According to the procedure chart, ______
provided the nucleus for Dolly the sheep.
A. Sheep A. B. Sheep B.
C. Sheep C. D. None.BC3. Generally, an original sheep live _____ years
old.
A. 10 B. 12 C. 13 D. 6.5C4. It can be inferred from the passage that a
cloned animal ________.
A. usually lives as long as the original one
B. usually lives longer than the original one
C. usually dies earlier than the original one
D. is usually as healthy as the original oneC5. Which of the following is wrong?
A. Cloned people would live forever.
B. Cloned people may be killed at will for
medical aid.
C. A woman would have difficulty
recognizing her real husband.
D. Men will die out because a woman can
give birth to a baby without a husband.D6.The word “controversial” in para 4 probably means
____________.
A. complicated
B. arguable
C. importantIs cloning beneficial or harmful to us?
Advantages VS. Disadvantages DiscussionProblems of cloningAnimal clones may develop the _______ of older
animals.
Animal clones may die _______ than the original
animals.
___ _______may want to clone themselves.
There are_____ objections to cloning human beings.
Cloning is ____________because scientist may
create monsters by mistakes.
illnessesyoungerEvil leaders moraldangerousCloning plants can be useful for research on ____
_____ _______.
Cloning plants can produce _________quantities
of plants.
Cloning is valuable for _______ research on animals.
Medical cloning could produce _____for serious
illnesses in humans
It can help couples who have no baby to _____a
new baby
Cloning can help save __________animals.Advantages of cloningnew plant speciesmedicalcures bearendangeredcommercialTeam work: Debate
Should cloning be allowed or not? vsShould cloning be allowed?greetingsargumentsreasonsSummarize your debateHello, everyone today.I suggest that________________
I would like to suggest that_______
We firmly believe that___________
We hold the view that___________First of all,_________________
Secondly,______________________
Last,___________________We hope you will agree with us and support our
point of view.(论点)(agree)(disagree)2001 cloning cattle我国成功繁殖克隆兔 体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。
2002 cloning cats第一只克隆宠物猫克隆马及其“母亲兼姐姐”克隆的荧光小猪(左)和正常小猪(右)2005 cloning dogsAssignmentWrite a composition
Is cloning good or bad to us?
2. Find out all the appositive clause
in the passage.
Thank You