🧬ap biology review

G2 Phase

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

The G2 phase is the third subphase of interphase in the cell cycle directly preceding mitosis. It follows successful completion of DNA synthesis and chromosomal replication during the S phase.