Cloning Today
Beginning of paper
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 paper
.... plants from
mature single cells placed in a nutrient culture containing hormones. The first
cloning of animal cells took place in 1964. John B. Gurdon took the nuclei from
tadpoles and injected them into unfertilized eggs. The nuclei containing the
original parents’ genetic information had been destroyed with ultraviolet 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 achie ....
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Page count: 4 (approximately 250 words per page)
