Word: clones
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...book and movie The Boys from Brazil, a demented Nazi doctor uses blood and tissue cells from Adolf Hitler to clone dozens of copies of the German dictator in the hope that at least one of them will seize power and conquer the world. Though the cloning of human beings is likely to be confined to fantasy for decades-perhaps forever-other kinds of cloning have long been possible. The Greek word klon means twig, and the simplest kind of vegetable cloning consists of cultivating cuttings from a plant. By the mid-1950s scientists had succeeded in cloning amphibians, producing...
...researchers drew out the egg and sperm nuclei that were already in the black mouse's egg so that their genetic information could not influence the resulting clone. Next they cultured the cell in a solution of nutrients until it divided and grew into an early embryo, which was then inserted into the womb of a third mouse, this one white. The white mouse gave birth to a gray mouse, genetically identical to the original embryo...
Almost every cell in an organism contains all the genetic information needed for reproducing the entire organism. But getting that information to turn on or, as biologists put it, to "express" itself, is the main problem in animal cloning. It has been done now with immature cells. But as cells become differentiated, they seem to lose the ability to release genetic instructions for anything other than what they have become. A red blood cell can become only another red blood cell, for example. For that reason, Illmensee and Hoppe were only able to clone mice from embryonic cells that...
Some variation of the Illmensee-Hoppe technique may one day be used to clone prize bulls or even human beings...
Since Hartman was the key to that success, the network even tried to clone him. NBC executives quietly approached another actor, Alan Alda of MASH, to see if he would like to replace Brokaw. Alda was flattered but said...