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Cloning Today
Part 1 of Paper
....roduction, a process in which a new organism develops
from only one parent. The one process of cloning, called nuclear transfer,
replaces the nucleus of an immature egg with a nucleus from another cell. Most
of the work with clones is done from cultures. An embryo has about thirty or
forty usable cells but a culture fe.... Part 2 of Paper
....ltraviolet light.
When the eggs were incubated, Gurdon discovered that only 1% to 2% of the eggs
had developed into fertile adult toads. The first successful cloning of mammal
was achieved nearly twenty years later. Scientists from Switzerland and the U.S.
successfully cloned mice using a method similar to Gurdon’s, but required one
extra step. After the nucleus was taken from the embryos of one type of mouse,
they were transferred into the embryos of another mouse who served as the
surrogate .... |
| Number of words: 918 - Approximate pages: 4 |
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