Alternation of generations
a reproductive cycle in which a gamete producing or gametophyte phase alterations with a 2n zygote, 2n multicellular, or 2n sporophyte phase. In plants, it is a reproductive cycle in which a haploid, diploid, or ployploid phase produces gametes. These gametes after fusion or syngamy form a zygote that is diploid or polyploid, and this sporophyte develops to some point and produces meiospores. The meiospores develops into the gametophyte.