What is cloning?
Cloning is the making of an organism genetically the same to another by means of genetic engineering.
The basis of cloning is the nucleus transplantation machinery. A nucleus from a cell is extracted, usually from an embryonic (not differentiated) cell and this nucleus is inserted into a previously enucleated reproductive cell (in general an egg cell); the egg is then implanted in the organ where the embryonic development will take place. If embryonic development occurs the new organism will have identical genetic patrimony to the organism owner of the cell whose nucleus was used in the transplantation.