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Cloning Today
Beginning of essay
A clone is a group of organisms that are genetically identical. Most clones
result from asexual reproduction, 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 cel ....
Middle of essay
....of mouse,
they were transferred into the embryos of another mouse who served as the
surrogate mother. This mouse went through the birthing process to create the
cloned mice. The cloning of cattle was achieved in 1988, when embryos from prize
cows were transplanted to unfertilized cow eggs whose own nuclei had been
removed. In 1993 the first human embryos were cloned using a technique that
placed individual embryonic cells (blastomeres) in a nutrient culture where the
cells then divided into 48 n.... |
| Number of words: 918 |
Approximate pages: 4 |
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