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Several clones had been produced in the lab before Dolly, including frogs, mice, and cows, which had all been cloned from the DNA from embryos.Dolly was remarkable in being the first mammal to be cloned from an adult cell.Human Cloning is Wrong I bet many of you have seen Star Wars, Jurassic Park, Multiplicity, or many of the other movies that describe cloning. What you don't know if that cloning could be dangerous, to the clone and to our society as a whole. What would happen if we overrode those rights by giving them someone else's genetic identity?
This has created a market for commercial services offering to clone pets or elite breeding livestock, but still with a $100,000 price-tag.
The advances made through cloning animals have led to a potential new therapy to prevent mitochondrial diseases in humans being passed from mother to child.
Dolly the sheep, as the first mammal to be cloned from an adult cell, is by far the world's most famous clone.
However, cloning has existed in nature since the dawn of life.
This was a major scientific achievement as it demonstrated that the DNA from adult cells, despite having specialised as one particular type of cell, can be used to create an entire organism.
Animal cloning from an adult cell is much more difficult than from an embryonic cell.
The unfertilised egg cell came from a Scottish Blackface ewe.
When the research team had managed to fuse the nucleus from the adult white sheep cell with the egg cell from the black-faced sheep, they needed to make sure that the resulting cell would develop into an embryo.
They had to find a way to 'reprogram' the udder cells - to keep them alive but stop them growing – which they achieved by altering the growth medium (the ‘soup’ in which the cells were kept alive).
Then they injected the cell into an unfertilised egg cell which had had its nucleus removed, and made the cells fuse by using electrical pulses.