Tuesday, 20 March 2012

Animal Cloning

Dolly the sheep, as every should know, is the first animal to be cloned in the biotechnology industry.  Cloning is the process of replicating new multicellular organism by extracting nucleus from the donor adult cell and inject it into am empty mother cell,  by using this way, it makes the cell genetically the same to another.


The process of cloning organisms might sound complicated but in fact it's not, like I mentioned just now this process is by putting donor adult cell's nucleus in to an empty cell without a nucleus.  After this process, the cell will normally start dividing to more cells in the uterus of the surrogate mother and develop until birth.

Even though animal cloning might sound normal and common nowadays but in fact there have been may oppositions against this technique ever since this technique is being used.  Different religious organizations like the Catholic Church are opposing such idea of replicating animals instead of being natural.  In recent years, the U.S. Food and Drug Administration has also approved the meat of cloned-animals to be sold in markets while it is not required to label on the cloned-meat which cannot be distinguished from normal meat products.  This has brought up awareness of customer rights and people started to critic about this matter.

Animal cloning has also been proved recently that abnormalities are found out from numbers of cloned-animals. The moment when the animal is born might seems normal, but many abnormalities will start to present in later life of the animal.  These abnormalities include premature death, liver failure and obesity.

So, if there are these ethic problems existing around animal cloning, why would scientists still invest so much money and time in this?  It is because the advantages of it worth scientists to take chances.  As animal species are declining on earth, many animals have gone extinct. Animal cloning allows scientist to bring any extinct species back or cloning endangered species to increase the population.  And this has been a dream for many scientists.  In January 2009, the Pyrenean ibex, an extinct animal, was cloned in the United States.


Links:


Gray R. & Dobson R. (2009)  Extinct ibex is resurrected by cloning, Viewed 18 March 2012: http://www.telegraph.co.uk/science/science-news/4409958/Extinct-ibex-is-resurrected-by-cloning.html

Halim, N. (2002)  Extensive new study shows abnormalities in cloned animals.  Massachusetts institute of technology.  Viewed 18 March 2012: http://web.mit.edu/newsoffice/2002/cloning-0911.html

Hansen M. Ph.D. (2007)  FDA says cloned animals are OK to eat. Viewed 18 March 2012:  http://www.telegraph.co.uk/science/science-news/4409958/Extinct-ibex-is-resurrected-by-cloning.html

Holloway G. (2002)  Cloning to revive extinct species.  Viewed 18 March 2012: http://edition.cnn.com/2002/WORLD/asiapcf/auspac/05/28/aust.thylacines

McFarland, Douglas (2000)  Preparation of pure cell cultures by cloning.  Methods in Cell Science 22(1): 63–66. http://dx.doi.org/10.1023%2FA%3A1009838416621

Cherie 42833972


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