![]() Gametophytes are produced by the process of mitosis Sporophytes are produced by the process of meiosis Table 1: Difference between Gametophytes and Sporophytes In the animal kingdom, invertebrates, such as protozoans, flatworms, jellyfish, etc, also exhibit alternation of generation.Īt this stage, let us understand the difference between Gametophyte and Sporophytes (Table 1). Fungi and algae are common examples that exhibit alternation of generation. Alternation of generation is also sometimes referred to as metagenesis or heterogenesis. Image source: CNX OpenStax, CC BY-SA 4.0Īlternation of generation is the repetitive interchange of change in the life cycle from one asexual generation to the sexual generation and vice versa. Figure 1: Simplified diagrammatic representation of alternation of generation between gametophyte and sporophyte. Conversely, in higher plants, the sporophyte stage is the predominant stage wherein the post embryological development, the sporophytic plant is an independent photosynthetic plant.Ī simplified diagrammatic representation of the alternation of generation between sporophyte and gametophyte is represented below in Figure 1. In bryophytes, the sporophytic stage is short and is dependent upon the female parent permanently for its nutritional requirement. As for primitive plants like bryophytes, the gametophyte stage is the dominant phase in the plant life cycle. During the evolutionary development, the sporophyte stage became the dominant phase in higher plants. The extent of dominance of these phases varies between different plant species and algae. Megaspores (that eventually form female gametophyte).Microspores (that eventually form male gametophytes).Below are the basic types of spores in plants. The spores are single nucleated propagative microscopic structures that have the primary function of spreading the plant culture and reproduction. This type of dual-phase life cycle (gametophyte and sporophyte stages) is known as the haplodiplontic life cycle. Through the process of fertilization, gametes give rise to sporophytes. These spores later develop into gametophytes that produce gametes having a haploid or single set of chromosomes (n) by the process of meiosis. During the sporophyte stage, the plant produces spores with diploid or two sets of chromosomes (2n) by the process of mitosis.
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