Haplontic life cycle involves the formation of a haploid (n) single cell by the meiosis of a diploid (2n) zygote. In the context of biology, a biological life cycle is a sequence of changes a particular organism undergoes through means of reproduction (sexual or asexual) which finally returns to the original starting phase. The life cycles differ with regards to different species. This is the difference between haplontic and diplontic life cycle. The haplodiplontic life cycle is also known as the diplohaplontic or diplobiontic.This type of life cycle is noticed in the ferns, there is regular alternation between a sporophytic generation and the gametophytic generation.The fern plant represents the diploid sporophyte which undergoes asexual reproduction and produces haploid spores.These spores on germination give rise to gametophytic prothallus.The … In diplontic life cycle, the diploid stage is typically multicellular, and meiosis occurs during gamete formation which results in the production of haploid (n) gametes and fuse to form a diploid (2n) zygote. Answered 111. Life cycle of a moss. In gametic meiosis, instead of immediately dividing meiotically to produce haploid cells, the zygote divides mitotically to produce a multicellular diploid individual or a group of more unicellular diploid cells. Haplontic Life Cycle A zygotic meiosis is a meiosis of a zygote immediately after karyogamy, which is the fusion of two cell nuclei. The diploid form, the diplont or sporophyte, is the dominating form in these life cycles. The Gametophytic stage consists of two stages(i). In haplontic life cycle, mitosis occurs in the haploid (n) phase which is multicellular, and the diplod (2n) stage is the zygote which undergoes meiosis. The life cycle of pteridophytes is a continuous reproductive process that is dominated by the sporophyte (sexual) stage of the alternation of generations. The distinction of "free-living" is important, because all sexually reproducing organisms can be thought to involve alternating phases, at least at the cellular level as meiosis. Compare Haplontic and Diplontic Life Cycles, Haplontic and Diplontic Life Cycles Differences, Haplontic and Diplontic Life Cycles Similarities, Difference Between Coronavirus and Cold Symptoms, Difference Between Coronavirus and Influenza, Difference Between Coronavirus and Covid 19, Difference Between Chastity Rings and Purity Rings, Difference Between Budding Yeast and Fission Yeast, Difference Between Calcium Chloride and Potassium Chloride, Difference Between Anabolic and Hyperbolic, Difference Between Major and Minor Histocompatibility Antigens. During gamete formation, meiosis takes place in the formation of haploid (n) gametes. In a diplontic life cycle, the diploid stage is typically multicellular, and meiosis occurs during gamete formation which results in the production of haploid (n) gametes. recessive mutations (loss-of-function) in genes required for meiosis. Mitosis takes place only in the diploid (2n) phase of diplontic life cycle. Meiosis occurs during the change over from a diploid stage to a haploid stage. This procedure differs from one organism to the other. The gametophytic phase is represented by the single to few-celled haploid gametophyte. Name three groups of plants that bear archegonia. However, they differ in their dominant phases. All Brown algae are multicellular and all go through an alternation of generation: diploid (2n) and haploid (n) phases alternate. Ask your question. 4. The spores undergo mitosis and develop haploid (n) gametes together; This is referred to as the gametophyte. Overview and Key Difference Economic importance of gymnosperms – Gymnosperms are of great economic value. However, not all biologists agree. Fern spores are catapulted into the air, and the spores develop into heart-shaped haploid gametophytes that contain both male and female sex organs. Haplo-diplontic: In haplo-diplonts the mitoses occur in both diploid and haploid cells. 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