a way of making an exact copy of 1.Cloning is a_n_o_t_h_e_r_a_n__im__a_l_a_n_d__p_la_n_t_.________ 2.Cloning has __t_w_o__m_a_j_o_r__ uses. 3.The _p_r_o_b_le_m__s_ of Dolly. 4. The e_f_fe_c_t____ of Dolly.
natural clones

cloned animals
NO. The first two are man-made clones, the rest two are natural clones.
Fast-reading
Task 1 Read the letter , then try to find the main idea of each paragraph.
3. Which statement is NOT true ? 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
Clone?
Natural clone
Natural clone is one that occurs from the “parent” in a natural form of cloning without human help.
Man-made clone
Man-made clone is one produced through human intervention (介入) .
5. It is _f_o_rb__id_d_e_n__ to clone human beings.
Choose the right answer according to the text.
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
money. D. Animal cloning is much more difficult than
plant cloning.
2. 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 lives shorter than the original one D. is usually as healthy as the original one
Warming up
In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ.
natural clones
Its name is Andi, the first genetically modified monkey.
克隆的荧光小猪(左)和 正常小猪(右)
cloned rabbit
克隆马及其 “母亲兼姐姐”
Not only animals but also plants can be cloned
The world’s first cloned cat, kitten, named Cc. It was created using a cell taken from an adult cat, Rainbow.
Dog Snuppy was created by Korean and American scientists
Period 1 Warming up& Reading
Dolly the sheep没爹没娘的多莉羊
She was c_lo_n_e__d_while the others were born naturally. It is the exact copy of another sheep and the first cloned mammal.
The plant produces its own runners.
A stem Take cuttings from growing plants to make new ones.
They are identical in sex and appearance, who are produced from the same original egg.
Questions about cloning
1. What is cloning?
Cloning is a way of making an exact copy of another animal or plant. They include natural and man-made clones.