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译林2003课标版《Welcome to the unit》PPT课件优质课下载
The advanced technique in genetics（遗传学）
with which scientists can create or copy things with the same DNA is called_________.
clone
Science and nature
What do you know about Dolly?
Dolly and its creator.
Science and nature
“Cloning” is a new biotechnology (生物技术) which aims to produce an exact copy(精确复制品） of an animal or a plant from its own cells.
Look at the following pictures and study them. Can you tell what is the main feature of cloning?
Science and nature
Dolly is together with her mother.
What do you know about Dolly?
Science and nature
the world’s first cloned mammal
created by Scottish scientists in 1996
sparked worldwide interest and
concern after its birth
many countries, including Germany,
France, Canada, Switzerland,
Austria, Norway and South America,
have banned human cloning since
Dolly’s birth
died in 2003 because of lung disease
Science and nature
These female pigs are also cloned. They were born on Christmas Day 2001. They were Noel, Angel, Star, Joy and Mary.