高二牛津英语模块5第三单元welcome to the unit课件 .ppt

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

Unit3 Science versus natureWelcome to the unitLead-in

Science is developing so fast that sometimes it is beyond our imagination. Man has created many things such as Radios, TV sets and so on. What else has been created by man? Could you give us some examples?

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

Explanation Clone: produce an exact copy

of an animal or a plant from its own cells

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

Picture-talk

Dolly

the world's first cloned adult animal. The scientists who cloned Dolly are to stop experiments involving genetically modifying pigs for human organ transplants because of concerns that deadly new diseases could be passed on to people.

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

The world‘s first cloned mule(驴), was born on May 4. He is created from a cell of his brother.

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

kitten

Rainbow

The world's first cloned cat, kitten, named Cc. It was created using a cell taken from an adult cat,Rainbow.

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

Five cloned pigs

The world's first cloned pigs were produced from an adult female pig using a different technique from the one that produced Dolly.

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

A pair of newborn cloned calves

They are the second adult-animal clones research centre said the new technique would be used to breed better cattle strains with higher-quality beef or greater milk capacity.

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

The first cloned monkey is another incremental step toward designing and perfecting new treatments for human genetic disorders.

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

From these pictures, can you identify the differences between the cloned animals and normal ones?

高二牛津英语模块5第三单元welcome to the unit课件 .ppt

Discussions

In your opinion, what might be the differences between these cloned animals and normal ones? Can these cloned animals lead a normal life as normal animals? For example, does the mule in Picture 2 run as fast as his brother? Do you think it would be a good idea to clone humans some day? Why or why not?