What is cloning?
Cloning is a way of making an
exact copy of another animal and plant. Who is famous in the cloning field?
Do you know something about Dolly?
When was she born? Is she man-made or natural cloning?
When did she die?
How long did she live? Why is she so famous?
How do scientists clone a sheep?
Step 1 A female sheep provides an
egg cell. The nucleus is removed
from the egg cell.
Step 2 A second female sheep provides a somatic cell. The nucleus is also
Step 3 The egg cell from sheep A and
the nucleus from sheep B are
joined together using
Step 4 The combined cell divides and
grows into an embryo.
Step 5 The embryo is then put into
female sheep C. Finally a
sheep D is cloned.
What animals have been cloned?
sheep, goats, oxen, mice, pigs, cats, rabbits and so on. Can you predict the future of cloning? What will is it leading us?
Cloning: Where Is It Leading Us?
1.The better way to get the main idea is:
A: Read the passage sentence by sentence and study the meaning of individual words or sentence if necessary. scan
B: Try to locate a topic sentence in the first, the last or sometimes in the middle paragraph. skim
What is the topic sentence of the first paragraph Cloning has always been with us and is here to stay. What is the topic sentence of the last paragraph?
However, scientists still wonder whether cloning will help or harm us and where is it leading us.
“ be here to stay” is an idiom , which means “ be accepted and used by most people”
1. The main idea of the text is____. A. animal cloning is very valuable and can benefit the world
B. animal cloning could be misused by bad people
so it must be forbidden
C. animal cloning is well developed because Dolly
the sheep was born
D. animal cloning raised arguments and scientists
are not sure about its future
2. Which of the following statements about cloning is NOT 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
3. The cloning of Dolly the sheep succeeded
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
D. many other attempts to clone mammals
4.Which of the following is not an advantage of cloning? A. Cloning can be used for medical purposes. B. Large quantities of food can be produced by cloning. C. Cloning can help keep animals from becoming extinct. D. Famous persons who have passed away can be cloned.
5. The sheep that donated the somatic
cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 12
When we come across questions that require us to infer , imply or conclude from the passage , remember to :____________ A. infer unknown facts from known facts B. use the direct information from the text
Reading – III Detail reading ( 8ms ) Fill in the blank using the information from the text.
1. Cloning not only happens in _____________, but also plants in ____________. animals
major uses 2. Cloning has two _______ _______. First , it can help gardeners produce___________ commercial ___________ _______ ___________. quantities of plants new Second, it is valuable for research on _________ plant _________species ________and for medical research on ____________. animals straightforward Cloning plants is ____________ while cloning animals complicated is very ______________.
followed the progress 3.The whole scientific world _______ ________ ________ of Dolly. At first, the fact that Dolly seemed develop normally _____was encouraging very _______________ . cast down Later, cloning scientists were _________ _________ to illnesses appropriate find that Dolly’s _________ were more _____________to a much older animal.
controversial 4. Cloning became __________.Using cloning to Cure serious illnesses _____ _____ ______.
What do you think is the writer’s point of view in this reading passage? Is it in favour of cloning or against it? impartial /neutral I think the writer is __________ because he/she does not state any personal ____________________________________ opinion about cloning. _________________________
Is cloning good or bad for us ? Write down your idea
A: I think cloning B: I think cloning is good for us. is bad for us. Because… Because…
Describe the picture in your own words
Watch the movie and discuss
What is your opinion of cloning human?
Write a passage titled Is cloning good or bad? Your passage should include the following： 1)What is cloning 2)Advantages of cloning 3)Disadvantages of cloning 4)Your opinion of it
copyright ©right 2010-2020。