Yes! Twins infact share the same genetic materials hence are clones. Developed from same set of chromosomes that split after fertilization of the ovum. They also share most physical attributes. Can you trace the genetic transfer?
The picture to your right show twin girls..but this happens probably one in a million. Epigenetic modification? this is something else. Read same difference http://www.sciencenews.org/articles/20050709/fob1.asp
How do they clone cells or organisms. http://www.dnalc.org/cloning.html
So why clone? For medical purposes; cloning animal models for disease, cloning stem cells for research and pharmimg for drug production. and Cloning extinct animals ala Jurassic park? Theoritically yes for so long as the genetic material is preserved well. Some recently extinct species were cloned!
How about human cloning? There are ethical, legal and social issues to consider.
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