The tetrads seen in prophase I and metaphase I of meiosis are pairs of replicated chromosomes. Chromosome Pairing Chromosome pairing occurs in mitosis.
Chromosome pairing occurs only in meiosis.
Cell Division Cycle Meiosis is cyclic. Meiosis in contrast is unidirectional. The gametes either enter into fertilization or die. There are two rounds of cell division and therefore two rounds of DNA replication in meiosis. Students' preconceptions in introductory mechanics.