Metagenesis, a term commonly used in biology, refers to a process of alternation of generations between two distinct forms of an organism. Synonyms for metagenesis include heterogamy, alternation of generations, and diplohaplontic life cycle. Additionally, it is sometimes referred to as metageny, which essentially holds the same meaning. Heterogamy specifically refers to a process where organisms reproduce by gametes of different sizes. Alternation of generations is a term used to describe the life cycle of certain plants where there is a change in form between a sporophyte and gametophyte. Diplohaplontic life cycle describes organisms that have both haploid and diploid stages in their life cycle.