The succession of haploid and diploid phases in some sexually reproducing organisms, notably plants.
A life cycle in which the generation alternates from sexual to asexual (occurs for example, in sea lettuce).
the occurrence in one life history of two or more different forms differently produced, usually an alternation of a sexual with an asexual form.
a life cycle in which there are two stages: (a) a diploid, sporophyte stage which produces haploid spores by meiosis, and (b) a haploid, gametophyte stage which produces haploid gametes of two types, usually called male and female but technically microgametes and megagametes. The female gamete is fertilized to become a diploid zygote, which matures to become a diploid sporophyte, completing the cycle. Either the gametophyte or the sporophyte stage may be, and typically is, very small and remains attached to the other stage.
the alternation of two or more different forms in the life cycle of a plant or animal
Alternation between a haploid gametophyte phase and a diploid sporophyte phase in the life cycle of sexually reproducing organisms.
term referring to a life cycle in which there is more than one free-living stage, typically a spore-producing sporophyte and a gamete-producing gametophyte
A life cycle that alternates between a multicellular diploid stage and a multicellular haploid stage.
The plant life cycle, which alternates between a diploid sporophyte stage and a haploid gametophyte stage. 192
(Sporic Meiosis) : The life cycle type of all land plants and some algae, characterized by alternation between multicellular haploid ( gametophyte) and diploid ( sporophyte) generations. Isomorphic Alternation of Generations: Gametophyte and Sporophyte generations are identical in form. Characteristic of some algae (such as Ulva) with sporic meiosis. Heteromorphic Alternation of Generations: Gametophyte and sporophyte generations are visibly different. Characteristic of all land plants. Diagram of Sporic Meiosis Life Cycle Diagrams: Ulva, Liverwort, Moss, Selaginella, Fern, Equisetum, Conifer, Flowering Plant.
A life cycle in which a multicellular diploid stage is followed by a haploid stage and so on; found in land plants and many algae and fungi. PICTURE 1 | PICTURE 2
The alternation of gametophyte and sporophyte stages in the life cycle of a plant.
This is a feature of some life cycles, especially those of the more ancient groups of plants such as ferns, mosses and liverworts. One generation is called the gametophyte and is haploid (has only half the normal number of chromosomes). This generation produces gametes which fuse to make the second generation. This is called the sporophyte and is diploid. It produces spores which are scattered and germinate into new gametophytes. By having two generations, the plants can reproduce both sexually and vegetatively and do not compete for resources.
Life cycle in which haploid and diploid generations alternate with each other.
Alternation of generations is a reproductive cycle of certain vascular plants, fungi, and protists. The term is a bit confusing for people familiar only with the life cycle of a typical animal. A more understandable name would be "alternation of phases of a single generation" because we usually consider a generation of a species to encompass one complete life cycle.