化约论极致发展的危机.ppt

42:34-43:14 * * * ＊封面 * The first human clone: it’s a girl Proud American geneticists have announced the world’s first cloned human embryo. By coaxing egg cells to divide without adding sperm, they created all- female embryos. But all six eggs that divided into cloned embryos died after a few days. The scientists claim they are aiming to create disease-busting stem cell, not a cloned baby. The team from Advanced Cell Technology. Massachusetts hope that one day stem cells cloned from a patient’s cells could be used to treat their illnesses. 27 November 2001 * V First human clone – or is it? 2003 started with a baby boom and claims that a handful of New Year newborns are the first human clones. Scientists are sceptical, saying the wannabe cloners have made it look too easy. Cloning has a poor track record. Of the ten types of animal they’ve tried to clone so far, only six have produced live young using the technique that created Dolly the sheep. 16 January 2003 * * First human clone? How would you check a suspected clone’s credentials? DNA fingerprinting is often used to link a suspect to the scene of a crime or prove the identity of a child’s father. Could the same technique sort out whether a bouncing baby is really from the clone zone? Antenna asked DNA detective David Hartshorne. A DNA fingerprinting is the unique pattern made when particular stretches of your DNA are copied and the pieces lined up according to their size. The same technology would be suitable for testing a clone, using a few cells scraped from inside the mystery child’s cheek.” David Hartshrone, DNA fingerprinter, Orchid Cellmark Diagnostics A clone would have exactly the same DNA blueprint as the person it was created from, but babies made the good old-fashioned way have a pattern that combines the DNA fingerprints of mom and dad. * “Animal cloning is inefficient in all species. Expect the same outcome in humans as in other species: late abortions, dead children and surviving but abnor