Unspecialized cells, cell which can make exact copies of itself indefinitely, can differentiate, and produce specialized cells for various tissues of body
Stem cells
can become any kind of cell
Totipotent
can become almost any kind of cell
Pluripotent
can become a limited range of cell types
Multipotent
More difficult to locate than those in an embryo
Adult stem cells
the nucleus from a somatic body cell is transferred to an egg from which the egg nucleus has been removed, Dolly the Sheep
Somatic Cell Nuclear Transfer
Stem cell that can only differentiate into one type of cell
Unipotent
Where to find adult stem cells
Tissues, umbilical cord blood, bone marrow, brain, skin, liver