The reduction happens at meiosis I, not meiosis II
Meiosis I is the reduction division: homologous chromosomes separate, halving chromosome number. Meiosis II resembles mitosis in that sister chromatids separate, and it changes ploidy not at all. Two features are unique to meiosis I and appear in almost every question on this chapter. Synapsis pairs homologues into a tetrad held by the synaptonemal complex, and crossing over occurs at chiasmata during prophase I. Then at metaphase I the tetrads — not individual chromosomes — line up at the plate, and at anaphase I the homologues are pulled apart while sister chromatids stay joined at their centromeres. Cohesin along the arms is cleaved at anaphase I; centromeric cohesin survives until anaphase II.