AP BIOLOGY

Detailed explanation-1: -DNA replication occurs in both mitosis and meiosis. In meiosis, the cell undergoes two divisions, i.e. meiosis I and II. Meiosis I is reduction division and meiosis II is similar to mitosis but DNA replicates only once during meiosis, i.e. before meiosis I in S phase .

Detailed explanation-2: -Before meiosis actually begins, the DNA that is packaged into chromosomes must be fully copied. Previous to replication, a germ cell contains two copies of each chromosome, a maternal copy, and a paternal copy.

Detailed explanation-3: -DNA must be packaged into chromosomes prior to mitosis or meiosis to ensure the equal distribution of DNA into the daughter cells.

Detailed explanation-4: -DNA replication takes place in S-phase of the Interphase before Meiosis I begins.

Detailed explanation-5: -In both mitosis and meiosis the replication of DNA and chromosomes occurs at the same stage.