In this famous example of cloning, an ordinary cell was used to replace the nucleus of an egg cell, so all of Dolly’s cells had identical DNA to the one parent that donated the cell. This form of cloning produced a single genetically identical offspring.
Ethical issues
Animal cloning raises ethical issues about how far humans should be allowed to interfere in the production of new life. Regulations currently restrict scientific research into human cloning.
Cloning plants is easier than cloning animals. Cloning expensive food crops has been carried out for many years, and causes the public fewer ethical and moral concerns than animal cloning.