Cloning Experiments on Sheep, Frogs, and Mice Have Shown That

Cloning experiments on sheep, frogs, and mice have shown that

A) nuclei of adult cells are totipotent.
B) nuclei of embryonic cells can be totipotent.
C) nuclei of differentiated cells have different genes than zygote nuclei have.
D) differentiation is fully reversible in all cells of a frog.
E) differentiation involves permanent changes in the genome.