Gametofyytti
Gametofyytti, the Finnish term, is known in English as the gametophyte. It is the haploid phase of the plant life cycle in alternation of generations. It arises from a spore produced by the diploid sporophyte through meiosis and grows by mitotic division. The gametophyte produces the gametes—sperm and eggs—either directly on its tissues or within specialized organs called antheridia and archegonia. Fertilization of an egg by a sperm forms a diploid zygote that develops into the sporophyte, completing the cycle.
Across plant lineages the prominence of the gametophyte varies. In bryophytes (mosses, liverworts, hornworts) the gametophyte
Because the gametophyte produces gametes by mitotic division, it maintains a haploid genome, while meiosis occurs