西安建筑科技大学：《大学英语》课程教学资源（大学体验英语，PPT课件讲稿，第三册）Unit4_C-S

Return to menu Do you know Let's learn

Return to Menu Do you know ... Let’s learn

Do you know… The significance of"Dolly"in cloning? How a human might be cloned using “ Dolly method?

The significance of “Dolly” in cloning? Do you know ... How a human might be cloned using “Dolly” method?

History of Cloning Cloning is not new. Experiments with frogs and toads(蟾蜍) date back to the1970s And experiments involving plants and animal embryos have been performed for years. But experiments involving human beings have se never been tried or thought possible, until “ Dolly” Her birth shocked the scientific community and has spurred discussion about the possibility of human clones

History of Cloning Cloning is not new. Experiments with frogs and toads (蟾蜍) date back to the 1970s. And experiments involving plants and animal embryos have been performed for years. But experiments involving human beings have never been tried or thought possible, until “Dolly” Her birth shocked the scientific community and has spurred discussion about the possibility of human clones

History of Cloning Dr Lee Silver, a molecular biologist at Princeton University, is optimistic that" human cloning will occur, " and that"it might <ake five years, ten years at the outermost. Lee notes that at this time, "no ethical doctor would do human cloning Although this view is predominant(占主导地位的) among many scientists, some argue that a safe technology could be developed in the future. This has led to discussion about whether human cloning should even be legally possible

Dr. Lee Silver, a molecular biologist at Princeton University, is optimistic that “human cloning will occur,” and that “it might take five years, ten years at the outermost.” Lee notes that at this time, “no ethical doctor would do human cloning”. Although this view is predominant (占主导地位的) among many scientists, some argue that a safe technology could be developed in the future. This has led to discussion about whether human cloning should even be legally possible. History of Cloning

How a human might be cloned using the“ Dolly"method (1A cell is 3 The DNA from the taken from cell is removed and a donor transferred to the egg woman 2An unfertilized egg is taken from a second woman 4 The egg is implanted into a surrogate mother 5 The resulting baby is genetically identical to the original donor

How a human might be cloned using the “Dolly” method

Let's earn Dolly(a nursery rhyme

Dolly (a nursery rhyme) Let’s learn

Dolly Mary had a little lamb, its fleece was slightly grey, It didn't have a father, just some borrowed DNA It sort of had a mother; though the ovum(卵细胞) was on loan, It was not so much a lambkin as a little lamby clone And soon it had a fellow clone and soon it had some more They followed her to school one day, all cramming through the door It made the children laugh and sing the teachers found it droll: (滑稽,可笑)

Mary had a little lamb, its fleece was slightly grey, It didn’t have a father, just some borrowed DNA. It sort of had a mother, though the ovum (卵细胞) was on loan, It was not so much a lambkin, as a little lamby clone. And soon it had a fellow clone, and soon it had some more, They followed her to school one day, all cramming through the door. It made the children laugh and sing, the teachers found it droll (滑稽，可笑), Dolly

Dolly i There were far too many lamby clones for Mary to control, No other could control the sheep, since their programs didn't vary, So the scientists resolved it all, by simply cloning Mary But now they feel quite sheepish, those scientists unwary(i 慎 One problem solved, but what to do, with Mary, Mary, Mary

There were far too many lamby clones for Mary to control, No other could control the sheep, since their programs didn’t vary, So the scientists resolved it all, by simply cloning Mary. But now they feel quite sheepish, those scientists unwary (不谨 慎), One problem solved, but what to do, with Mary, Mary, Mary. Dolly

The End I

The End