Name the phases in interphase, and describe what happens during those phases. Solution 16.Interphase consists of the G1,S,and G2 phase.The G1 phase involves the increase in size of the cell and the production of organelles.DNA is synthesized in the S phase while in G2 the cell continues to grow in size and manufactures materials needed for mitosis.Those cells that do not divide for mitosis do not synthesize additional DNA or prepare for mitosis.These cells remain in an interphase state known as G0..