2. A mammary cell contains copies of all genes needed to produce a sheep, but only genes for proteins required by mammary cells are active.

3. Cells grow and divide, generating precise copies of themselves. Then the cells are deprived of nutrients, inducing them to dormancy. At this stage, all their genes can be dominated.

4. Another (or even the same) ewe provides the egg.

5. The egg is preserved in a laboratory dish.

6. The nucleus is dislodged from the egg.

7. The mammary cell and the nucleus from the egg blend with a spark of electricity. Molecules in the egg then program genes in the mammary cell to engender the embryo.

8. Clusters of embryonic cells are grown.

9. Embryos are implanted into a surrogate mother.

10. The resulting lamb is a clone of the donor ewe.