They are now owned by a company and may become very valuable. Some bone marrow cells from humans can also give rise to muscle tissue and other cells can give rise to neurons, bone, fat. Finally, it also appears as if even terminally differentiated cells may be encouraged to regain stem cell function. Dolly is one example of this potential. Investigators now know that one can separate cells during early embryonic development and they will then develop into normal, complete individuals.
Twins can be clones.
The cloning of Dolly was significant because it involved the transfer of a nucleus from an adult, differentiated cell into an enucleated egg.