Cloning of Animals

On Sunday, February 23, 1997, Scottish researchers broke one of nature\'s greatest laws by cloning a lamb
from a single cell of an adult ewe. This breakthrough opens the door to the possibility for the cloning of
other mammals including humans.
This remarkable achievement is being looked at as a great advancement in animal agriculture. But
this achievement could lead to ethical questions of standard.
Researchers lead by Ian Wilmut of the Roslin Institute in Midlothian, Scotland, showed that a
fully differentiated cell from the mammary tissue of an ewe could be manipulated in such a way as to
produce a genetically identical copy of the animal that the DNA was acquired.
Scientist long believed that once a cell became differentiated, that most of its approximately
100,000 genes shut off. Only a few genes remained active to allow the cell to perform its specific function
of life. All efforts to reactivate the shut-off genes have failed. English researchers have came the closest
by teasing frog body cells to develop into tadpoles. The tadpoles, however, never matured into frogs.
The Scottish researchers have failed many times with sheep cells before their success, but the task
was perfected and accomplished. Now this accomplishment has made it possible for the cloning of almost
any mammal, including humans.
To the average person, exactly how the technique works is unclear. Scientist predicted that by
making cells dormant and bringing them close to death, something happens to break the chemical locks
(barriers) that keep most of the genes inactive. The mammary cell is inserted into an unfertilized sheep egg
cell that has already had all of its own genetic material removed. By fusing the cells together tricks the egg
into thinking that it has become fertilized.
After being fused together, researchers believe that the chemical machinery inside the egg cell
goes to work to reprogram the mammary cell genes into starting over again, as if they were brought
together as sperm and egg. The cell divides, produces an embryo, fetus and a newborn that is identical to
the animal from which it was cloned.
Although the United States government prohibits government funds being spent on human cloning
research, and ethicists decry it, nevertheless, human cloning could be achieved, Neal First said. First is a
professor of animal biotechnology and reproductive biology at the University of Wisconsin.
Overall, there is no apparent reason to clone humans. A duplicate body does not mean a duplicated
mind. The clone\'s brain would be far different, for the clone would have to learn everything from its own
experiences. Is cloning a human ethical? Should we try to clone humans?
I believe that nature will clone what it wants to clone. Researchers should be careful for we no
nothing of the stability of any animal that is cloned by scientist. We don\'t know if that animal will be
dominant over the animal from which it was clone or if it will turn hostile. From my point of view having a
"clone" is not all it is cracked up to be.