The production of duplicate copies of genetic material, cells, or entire multicellular living organisms is called cloning. The copies are referred to as clones. Cloning occurs naturally and is also engineered by human beings. The possibility that people might be cloned from the cells of a single adult human being had long been a subject primarily of fantasy and science fiction but became very definite at the end of the 20th century. This possibility stemmed from the successful cloning of lower mammals, leaving little doubt in many scientists’ minds that humans could be cloned. [Source]
