人教版高中英语选修八《Unit 2 Cloning》Reading 课件 2

Therapeutic (治疗的) cloning is to produce a healthy copy of a s_ic_k_ person’s tissue (肌肉 组织) or organ for transplant in order to save the lives of those who would d_ie__ without it. This t_ec_h_n__iq_u_e_ would be many times better than r_el_y_i_n_g_ on organ transplants from other people. The tissue or organ would have the sick person’s original DNA.
the sheep, all of the following are
true EXCEPT ___C__.
A. the lamb is the clone of the donated cell from sheep B
B. electricity is needed C. female sheep B provides an egg cell D. three female sheep are used
1) Cloning means making a copy of an animal or a plant.F
2) Gardeners can make a lot of money by cloning plants. T
3) Cloning animals is as complicated as cloning plants. F
4) Dolly the sheep was the first successful clone of a mammal. T
5) Natural clones happen in animals as well as in plants. T
Do you know about the procedure works of a sheep?
In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Think about how they differ.
It’s the most famous sheep in the world. Do you know how Dolly is different from other sheep?
Dolly the sheep
She was cloned while the others were born naturally. It is the copy of another sheep.
What can you see in the picture?
I can see a strawberry plant producing runners in a natural form of cloning.
What do you know about twins?
There are twins of the same sex and those of different sexes. The twins here are identical in sex and appearance and are good examples of natural clones. They carry the same genetic information. The fertilized egg has split into two while inside the mother, and so produced two identical human babies.
Read the text carefully and fill in the blanks.
Definition Cloning is a way of making _a_n_e_x_a_c_t_c_o_p_y_ of another animal and plant.
Major • Gardeners use it to p__ro_d_u__ce_ uses of commercial quantities of plants. cloning • It is valuable for research on
new plant species and for _m_e_d_i_c_a_l research on animals.
About ◆ Encouraging news: Dolly Dolly seemed to developn_o_r_m__a_ll_y_. the ◆ Disturbing news: Dolly lived sheep only six and a half years, half
Are the following clones the same? If not, what is the difference?
No. The first two are man-made clones.
The rest two are natural clones.
Questions about cloning: 1. What is a clone?
2. From the last paragraph we know that __C___.
A. cloning will come to an end because of objections
B. cloned human beings will be produced in the near future
3. What benefits can humans gain from cloning?
1) Medical cloning can help cure serious illnesses that ruin one’s quality of life (such as Parkinson’s disease帕金森症 or Alzheimer’s disease老年痴呆症).
the length of the life of the _o_ri_g_i_n_a_l sheep, because of serious illnesses which were more appropriate to a _m_u_c_h__o_ld__er__a_n_im__a_l.
Choose the best answer. 1. As for the cloning procedure of Dolly
2) It can help infertile people have babies.
4. What problems may arise when humans are cloned?
1) People may want to clone themselves so they can live forever.
Who cut the stem off the plant?
A gardener. The gardener is going to put it into a pot to produce another plant. He is actually making a copy of the plant.
Reproductive cloning is intended to produce a co_p_y_ of an existing an_i_m__a_l or a plant. Reproductive cloning of animals is al_l_o_w_e_d_ for technology and farming as well as for cloning e_n_d_a_n_g_e_r_e_d animals. But reproductive cloning of human beings is specifically fo_r_b_i_d_d_e_n_ by law in most coll use cloning in a wise way
D. all the research into human cloning will be forbidden
Write the letter “T” if the statement is true. Write “F” if it is false.
2) People may want to clone dead children.
3) People may want to clone their favorite pets.
Read the text quickly and complete its main idea.
The text is mainly about the 1. _p_r_o_ce_d_u__re_ of animal cloning and the life of Dolly the sheep, as well as the reasons why cloning is still 2. _co_n__tr_o_v_e_r_s_ia_l.
Read through the passage and find the main idea of each paragraph.
Para 1. Cloning is a way of making an exact copy of another animal and plant.
Para 2. Cloning has two major uses. Para 3. The birth and death of Dolly. Para 4. The effect of Dolly. Para 5. It is forbidden to clone human beings.
A clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same as it.
2. How is a clone produced? The cloning of plants is simple and relatively easy. It can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). The cloning of animals is more complicated. It was not achieved until 1996 and is fully explained in the first reading.
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