Final answer:
Injection of cytoplasm from an interphase donor cell into G2 arrested frog oocytes induces premature meiosis in the immature oocyte.
Step-by-step explanation:
When G2 arrested frog oocytes are injected with cytoplasm from an interphase donor cell, it induces premature meiosis in the immature oocyte. The cytoplasm contains a chemical that causes the cell to lose its nuclear membrane, condense its chromatin into chromosomes, and enter meiosis. This experiment demonstrates that the cytoplasm from a mid-meiotic oocyte contains a factor that promotes meiosis in other cells.