Why is it necessary to use an egg cell for cloning an animal Why can't you just use the donor cell from the adult animal?

Cloning an animal requires an egg cell because it provides the necessary cellular environment and factors that support the reprogramming of the donor nucleus from the adult animal. The egg cell contains specific cytoplasmic components that facilitate the development of the embryo, which are not present in somatic (donor) cells. Simply using the donor cell would not initiate the correct developmental processes needed for successful cloning. Thus, the egg cell acts as a crucial facilitator for the reactivation of the genetic material from the donor cell.