Welcome to the unit
The advanced technique in genetics(遗
传学) with which scientists can create
or copy things with the same DNA is
Cloning is the creation of cells or whole animals by using DNA(脱氧核糖核酸) from a single "parent", bypassing (绕道而行) the normal reproductive (生殖) process. The clone has the same DNA to the “parent”.
Dolly and its creator
What do you know about Dolly?
?the world’s first cloned mammal ?created by Scottish scientists in 1996 ?died in 2003 because of lung disease ?many countries have banned human
cloning since Dolly’s birth
the cloned kitten
The kitten in the picture is called Cc. Its name is from “Copycat”. Scientists in the USA created it with a cell taken
from its mother, Rainbow. It was born
in December 2002.
the cloned female pigs
The five little pigs’ names are Noel,
Angel, Star, Joy and Mary.
the first cloned monkey
The name of the cloned monkey is ANDi. It is from “inserted DNA” spelt backwards. It is the first genetically modified monkey. The technology is different from that used for Dolly.
Do you think the cloned animals are as healthy as the natural ones?
Dolly is, but scientists do not yet know whether this is the exception(例外) or the rule. Some early evidences suggest that clones may have health problems and that they may age prematurely (早衰的，未老先衰).
If you are a scientist, what do you want to clone? Why?
Fun pictures If cloning goes wrong, what will happen?
A dog or an eagle?
A duck or a crocodile?
A cock or a dog?
A lion or a kangaroo?
A frog or a crocodile?
A tortoise or a bear?
A bird or a dog?
What do you think of the new kind of technology? Does it have advantages or disadvantages?
Do you think governments should pass laws to prohibit human cloning? Why or why not?
They shouldn’t, for… 1. Cloning can help cure many diseases and save a lot of people lives. 2. …… 3. ……
They should, for… 1. Cloning can lead to ethical(伦理) problems. reasons: 2. …… 3. ……
Giving an oral report Today our class had a discussion about whether the governments should pass laws to prohibit human cloning. Some students think that the governments should, for… However, some other students think it necessary to prohibit…, for… In my opinion, …
Thank you for your attention!
1. Find more information about clone. 2. Review the new words.