Cloning and DNA(終稿).ppt

1、,Guess who,?,she discovered a novel therapy against Malaria(瘧疾).,She was awarded the Nobel Prize in Physiology or Medicine 2015.,Guessing,Guessing,Guessing,Youyou Tu,Guess who,?,Guessing,Guessing,Guessing,His pea plant experiment gained him the fame as the founder of the modern science of genetics.,

2、He was a biologist and what he researched established many of the rules of heredity(遺傳).,Gregor Mendel,Guess who,?,Her birth was announced on February 22, 1997.,She was the first mammal(哺乳動(dòng)物)to be cloned.,Guessing,Guessing,Guessing,Dolly the sheep,Cloning and DNA,東北師大附中 蘇亮亮,Part,1,What is DNA?,Readi

3、ng:,What is a clone?,DNA is a transparent twisting ladder made of the fundamental components of life.,What is cloning?,Cloning takes the DNA from a single cell to create a whole new individual.,A clone is an organism which is genetically identical to another one.,Reading,1,discovered,Reading:,The th

4、ree stages of the development of the science of genetics and cloning:,In 1866,In 1953,In 1973,Mendel first recorded results of growing pea plants.,Watson and Crick discovered the structure of the acid DNA.,Cohen and Boyer discovered the procedure to unzip the DNA.,In 1997 the first mammal Dolly was

5、cloned.,Discussion:,What would you like to clone?,Reading and discussion,To have children,To clone talents,To get stem cells,To clone strong animals and crops,Reasons,Reading and discussion,Anti-humanity,Losing biodiversity,An evil Einstein,Psychological pressure,An Italian doctor wants to offer clo

6、ning as an optional treatment for couples who find it difficult to have children.,Reading and discussion,anyone who was a clone of one of their parents would be throughout their childhood.,under unknown psychological pressure,But,could help someone recover from a disease, repair human tissue, or hel

7、p them walk again after an accident. These stem cells would need to come from an embryo taken from the clone of someone. But the embryo would then be wasted, _ _,Reading and discussion,which many people find unacceptable, because that is anti-humanity.,Stem cells,Some scientists and farmers think it would be handy to clone, for example, a cow which can resist bacteria or disease, or to sow a cloned crop which can resist rot or pests. But _ _,Reading and discussion,to rely on a few cloned animals or crops would restrict the biodiversity of the breed.,Brin