Meiosis is called reduction division because it involves two sequential divisions resulting in the reduction of the chromosome number by half. In meiosis, the original cell undergoes DNA replication followed by two rounds of division, resulting in the formation of four daughter cells with half the number of chromosomes as the original cell. This reduction in chromosome number is essential for sexual reproduction as it ensures that when gametes (sperm and egg cells) come together during fertilization, the resulting zygote will have the correct number of chromosomes.
