[简答题]Wiping away doubts that Dolly the sheep clone was a fluke, University of Hawaii researchers announced they’ve been cloning mice for months, creating a flock of more than 50 duplicate rodents along the way. 71. The success of the Hawaii group transforms adult cloning from a scientific novelty to a well-defined procedure likely to be .reproduced in labs around the world. The mass production of carbon copy mice, in turn, now allows researchers to test variations of the cloning techniques to see what works best. Cloning the genetically engineered mice used in medical studies should also be cheaper than current breeding methods.
The Hawaii researchers use essentially the same recipe used to make Dolly: Take an egg. Scoop out the nucleus, which contains the DNA genetic information, and discard. Take a cell of the animal you wish to clone and insert its DNA into the egg. Add chemicals to tell the egg to start developing into an embryo. Incubate the embryo in a test tube for a few