Final answer:
Reproductive cloning results in a zygote with a nuclear genome identical to the adult donor of the nuclear transplant cell.
Step-by-step explanation:
Reproductive cloning involves replacing the haploid nucleus of an egg cell with a diploid nucleus from a cell of a donor individual. As a result, the resulting zygote will have a nuclear genome that is identical to the adult who donated the cell for nuclear transplantation, option (b).