Passion Project: Cloning Milestones

 1938 Cloning envisioned. Dr. Hans Spemann (Germany) proposed an experiment to remove the nucleus from an unfertilized egg and replace it with the nucleus from a differentiated cell.

1970 Dr. John B. Gurdon (U.K.) clones a frog by transplanting the intestinal cell of a tadpole into an enucleated frog egg, which develops into an adult frog.

1996 Dr. Ian Wilmut and his team clone the world's first sheep from adult cells. The lamb born in July 1996 is named Dolly.

1997 Scientists at Oregon Regional Primate Research Center (U.S.) create the first primates—two rhesus monkeys named Neti and Ditto—from DNA taken from cells of developing monkey embryos. They are not genetically identical because two different embryos were used.

1997 A team led by Drs. Ian Wilmut and Keith Campbell (U.K.) create the first sheep with a human gene in every cell of its body. The genetically engineered lamb is named Polly.

2000 Japanese scientists clone a baby bull from a bull that was a clone itself, the first re-cloning case involving a large mammal.

2001 Scientists at Advanced Cell Technology in Massachusetts clone human embryos for the first time.

2011 A lab in Argentina becomes the first successful laboratory to create a transgenic cow. The use of human genes introduced during the cloning process means the cloned cow, Rosita ISA, will be able to produce human-like milk.

Citation:

https://www.infoplease.com/math-science/biology/genetics-evolution/cloning-milestones