MadSci Network: Cell Biology |
Hello Zoli, Thanks for your interesting question. Although most people think of humans or other animals (like Dolly) when they hear the word "clone", we scientists actually use the term more broadly. To us, a clone can be any of the following: 1.a group of genetically identical cells descended from a single common ancestor, i.e. a colony of bacteria grown from a single bacterial cell. 2. a copy of a DNA sequence (a gene, for instance). 3. an organism derived asexually from a single ancestor (plant or animal). The common denominator to all of these definitions is that a true clone must be an exact genetic replica of a SINGLE progenitor (organism/cell/piece of DNA). Therefore, an organism created by combining genetic information taken from five different organisms (Joe, Mary, John, Katy and Fred, for example) wouldn't be a considered a clone. Any current cell biology or molecular biology text will have information on the type of clone described in the first and second definitions, above. However, I suspect that you're more interested in the prospect of cloning humans. There is a ton of information on the web, a lot of it consisting of ethical concerns abut human cloning. The reference below provides accessible and fairly unbiased information on human cloning, and has links to many other sites. If this subject interests you, I would encourage you to find out more about it. If you have further questions after doing a little research of your own, please contact us again! Warm regards, Jen http://cac.psu.edu/ ~gsg109/qs/emclone.html
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