How does adult cell cloning occur?

In adult cell cloning, an egg cell is taken from a donor animal - such as a sheep - and it is enucleated. This means that the nucleus which contains all of the genetic information of the sheep is removed from the rest of the cell. The nucleus is discarded. From another sheep, the nucleus of a somatic cell is taken and inserted into the empty egg cell. An electric shock is then provided to the new cell to stimulate fertilisation. The cell will then begin to divide, forming an embryo. This is then inserted into the womb of a host mother, so a third sheep where it develops. Eventually, this sheep will give birth to an offspring that will be genetically identical to the second sheep from which the nucleus was extracted, as this is where all the genetic information came from in the process of adult cell cloning.

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