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There is an immense difference between cloning and
genetic engineering. When something or perhaps someone is cloned not a single
one of the bases of the DANN is changed. So we can get an image of something,
which looks like the other. But when we speak about genetic engineering we mean
that the DAN is altered and the product is completely different to the thing we
had first.
Genetically engineering hasn’t only negative
sides. There are also some necessary points for the future.
- Production of
pharmaceuticals
- As farm animals
with improved production
- As models of
human genetic disorders to develop human gene therapy
- To change the
character of animals organs to try to make them suitable for transplanting into
humans
Genetically engineered animals
could be used for medical research. For example to improve the situation of
haemophiliacs. They need blood clotting proteins so that they can survive when
they are hurt. These proteins could be produced in the milk of genetic altered
sheep.
Sheep have also been genetically engineered to secret
substances which can be used in the treatment of cancer or cystic fibrosis.
Cloned animals could have organs which are similar to human organs. In this way
scientists would be able to study genetic diseases for which there is no cure
until now.
Another possibility is, that these organs could be
used for heart, kidney or liver transplants. But they are imperfect substitutes.
Also new therapies could be tested before they are used on human beings. The
majority of animals which are tested are mice.
The desire to increase the food production is another
reason why scientists think, that genetic engineering is a good way to feed the
world population, which is going to become more and more. The animals with the
best meat or milk production could be cloned, so that there would be a herd of
super animals. But the meat of these cows and pigs hasn’t such a quality
as the meat of normal animals. Also the side effects aren’t investigated
exactly. So many pigs have to suffer a number of unpredicted side-effects, for
example lameness or arthritis.
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