The benefits of human cloning outweigh and outnumber the disadvantages because of the scientific achievement and the knowledge that could be gained for humanity. Cloning is the production of a genetically identical organism from the same individual organism. Embryo splitting is the natural type of cloning in which a single embryo is split into several embryos within the female's womb. The result of embryo splitting is identical twins. The second type of cloning is nuclear transplantation, and this is an artificial method, which was used to create Dolly.
Nuclear transplantation is a very delicate and complicated process.
In order to understand the process of nuclear transplantation, here is how scientists cloned Dolly. After growing the udder cells in a laboratory dish, scientists inserted one cell into the sheep egg cell of the Scottish Blackface ewe. The egg and the udder cell were fused together with a jolt of electricity and then another electric pulse made the fused cell start dividing. This process is very similar to the process Frankenstein used to create his monster in Mary Shelley's Frankenstein. The dividing cell was then transferred into another Scottish Blackface ewe, and the second gave birth to the original Finn Dorsett ewe.