The illustration depicts the following stages:

1. An egg cell is taken from an adult female sheep, and a donor cell is taken from a sheep's udder.
2. The nucleus of the egg cell is removed.
3. The two cells are fused using an electric shock.
4. The fused cell begins dividing normally and forms an embryo.
5. The embryo is placed in the uterus of a foster mother.
6. The embryo finally develops into a lamb - clone of the donor.