Gamete formation in both sexes involves meiosis, a unique kind of nuclear division that occurs in the gonads.Meiosis consists of two consecutive nuclear divisions (meiosis I and meiosis II) that follow a single round of DNA replication. Meiosis I reduces the chromosome number from 2n to n. It includes the series of prophase I, Metaphase I, Anaphase I, and telophase I. As a result, when meiosis I ends, each daughter cell has two copies of one member of each homologous pair and none of the other.Meiosis II begins with the products of meiosis I and is a mitosis-like nuclear division process. After processing through prophase II, Metaphase II, Anaphase II, telophase II and cytokinesis, the product is 4 haploid cells, each genetically different from the original parent cell.