During cellular division, the replication of DNA occurs a) before mitosis and between meiosis I and meiosis II.
During the cell cycle, DNA replication takes place during the S phase, which occurs before mitosis. This is crucial because each daughter cell needs a complete set of DNA. In meiosis, DNA replication happens before meiosis I but not between meiosis I and meiosis II. Therefore, the correct statement is that DNA replication occurs before mitosis and also before meiosis I. It does not occur again between the two meiotic divisions, which distinguishes meiosis from mitosis.