Gametophyte
Videos
A gametophyte is one of the two alternating multicellular phases in the life cycles of plants. It is a haploid multicellular organism that develops from a haploid spore, that has one set of chromosome
Pine gametophyte (outside) surrounding the embryo (inside)
Alternation of generations
Videos
Alternation of generations is the predominant type of life cycle in plants and algae. In plants, both phases are multicellular: the haploid sexual phase – the gametophyte – alternates with a diploid a
Gametophyte of the fern Onoclea sensibilis (flat thallus, bottom) with a descendant sporophyte beginning to grow from it (small frond, top)
Gametophyte of Mnium hornum, a moss
Sporophyte of Lomaria discolor, a fern
Gametophyte of Pellia epiphylla with sporophytes growing from the remains of archegonia