If chemical signals in the cytoplasm control the progression of a cell to the S phase of the cell cycle, then fusion of a cell in G1 with a cell in S phase would most likely cause transfer of organelles from the G1 cell to the cell in the M phase. replication of chromosomes in the G1 cell. condensation of chromatin in preparation of nuclear division in both cells. exiting of both cells from the cell cycle and into GO phase.