<prompt> Chromosomes are formed during which phase of cell cycleG1SG2M  <response>: Though the DNA is synthesized during the S phase of cell cycle, but the condensation of chromatin fibers into Chromosomes happens during metaphase of Mitosis phase M of cell cycle. Hence, if question ask about which phase of cell cycle for DNA synthesis, the answer is S phase. If asked about the chromosome formation, answer is M phase. 