Kary B. Mullis develops the polymerase chain reaction technique for rapid DNA synthesis.	Steen Willadsen clones sheep from embryo cells.	Steen Willadsen joins Grenada Genetics to commercially clone cattle.	Human Genome Project begins	Wilmut and Campbell clone sheep from differentiated cells.	Dolly, the first animal cloned from adult cells, is born.	Richard Seed announces his plans to clone a human.	Teruhiko Wakayama creates three generations of genetically identical cloned mice.
			Steen Willadsen clones cattle from differentiated cells.
	Solter and McGrath fuse a mouse embryo cell with an egg without a nucleus, but fail to clone using their technique.		First, Prather, and Eyestone clone a cow from embryo cells.			President Bill Clinton proposes a five year moratorium on cloning.	Wilmut and Campbell create Polly, a cloned sheep with an inserted human gene.