Identical twins born with their bodies joined at some point and having varying degrees of http://www.answers.com/topic/residual duplication, a result of the incomplete division of the...
Chang and Eng Bunker ( as I recall, no relation to Archie) were the first pair to survive to adulthood and they hailed from Siam. (they were male) hence the name. It is a congenital anomality and is...
Conjoined twins are identical but attached to each other and may share organs depending where they are attached to the others body. Conjoined twins are attached because the egg cells have not...