define dominant gametophyte
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The Life Cycle of Plants In bryophytes (mosses and liverworts), the dominant generation is haploid, so that the gametophyte comprises what we think of as the main plant. The opposite is true for tracheophytes (vascular plants), in which the diploid generation is dominant and the sporophyte comprises the main plant. Bryophyte Generations
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- Like the ferns and gymnosperms, angiosperms have a dominant sporophyte (2n) generation. Of the plants, angiosperms have the most dramatically reduced gametophytes with male (micro) gametophytes represented by a 3-celled structure and female (mega) gametophytes represented by a 7-celled structure.
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dominant adjective. 1  The definition of dominant is a person who is in a position of power or who is exhibiting powerful or controlling tendencies. 2  Dominant refers to a gene that will present itself by producing a characteristic that can be inherited.
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Bryophyte The prominence of the gametophyte in the life cycle is also a shared feature of the three bryophyte lineages (extant vascular plants are all sporophyte dominant). Other views An alternative phylogeny, based on amino acids rather than genes, shows bryophytes as a monophyletic group:
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A Moss Life Cycle: Dominant Gametophyte Let's look at a diagram of the basic idea of alternation of generations. We can see in this diagram that the life cycle is broken into n on the top and 2 n on the bottom. Remember that the gametophyte contains haploid cells and that the sporophyte contains diploid cells.
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Gametophyte A gametophyte is the haploid multicellular stage in the alternation of generations life cycle of plants and algae. It develops from a spore by mitotic cell division. Spores are the products of meiosis in sporophytes.Gametophytes produce haploid gametes by mitosis. In some types of plants and algae (e.g. Ulva) gametes are isogamous --that is, the gametes are all of one size, shape and general morphology.In land plants, Anisogamy is universal. As in animals, female and male gametes are called, respectively, eggs and sperm.t develops from a spore by mitotic cell division. Spores are the products of meiosis in sporophytes. Gametophytes produce haploid gametes by mitosis. In some types of plants and algae (e.g. Ulva) gametes are isogamous --that is, the gametes are all of one size, shape and general morphology.
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Sporophyte In flowering plants, the sporophyte comprises the whole multicellular body except the pollen and embryo sac. Bryophytes (mosses, liverworts and hornworts) have a dominant gametophyte phase on which the adult sporophyte is dependent for nutrition.The embryo sporophyte develops by cell division of the zygote within the female sex organ or archegonium, and in its early development is therefore nurtured by the gametophyte.ryophytes (mosses, liverworts and hornworts) have a dominant gametophyte phase on which the adult sporophyte is dependent for nutrition. The embryo sporophyte develops by cell division of the zygote within the female sex organ or archegonium, and in its early development is therefore nurtured by the gametophyte.
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- A gametophyte is a haploid multicellular plant or alga that produces gametes by mitosis. Two gametes fuse by syngamy to produce a diploid zygote, which develops into a sporophyte. A sporophyte is a diploid multicellular plant or alga that produces meiospores by meiosis. Each haploid meiospore is capable of developing into a gametophyte.
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- A sporophyte is a plant that produces spores (asexual reproduction) and a gametophyte is a plant that produces gametes (sexual reproduction). The word gametes refers to sperm and eggs. sporophyte is a plant that produces spores (asexual reproduction) and a gametophyte is a plant that produces gametes (sexual reproduction). The word gametes refers to sperm and eggs.
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- First, all plants undergo an alternation of generations, between a haploid gametophyte stage and a diploid sporophyte stage. In the most primitive plants, like mosses, the gametophyte is dominant (i.e. it's big and green). In higher plants like ferns and fern allies, the sporophyte stage is dominant.irst, all plants undergo an alternation of generations, between a haploid gametophyte stage and a diploid sporophyte stage. In the most primitive plants, like mosses, the gametophyte is dominant (i.e. it's big and green). In higher plants like ferns and fern allies, the sporophyte stage is dominant.
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gametophyte Our Living Language : The evolution of plants has seen a steady reduction in the independence and size of the gametophyte generation when compared to the sporophyte generation. In the more primitive nonvascular plants, such as the mosses and liverworts, the gametophyte is the main plant form.
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Talk:Alternation of generations Male gametes are sperm, and female gametes are eggs. In the plant life cycle, meiosis produces haploid spores. The spores develop into the gametophyte phase of the plant life cycle. The term gametophyte literally means gamete-producing plant.
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Sporophyte In flowering plants, the sporophyte comprises the whole multicellular body except the pollen and embryo sac. Bryophytes (mosses, liverworts and hornworts) have a dominant gametophyte phase on which the adult sporophyte is dependent for nutrition.The embryo sporophyte develops by cell division of the zygote within the female sex organ or archegonium, and in its early development is therefore nurtured by the gametophyte.n flowering plants the gametophytes are very reduced in size, and are represented by the pollen and the embryo sac. The sporophyte produces spores (hence the name) by meiosis, a process also known as reduction division that reduces the number of chromosomes in each spore mother cell by half.
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Sporophyte Most algae have dominant gametophyte generations, but in some species the gametophytes and sporophytes are morphologically similar (isomorphic).n flowering plants the gametophytes are very reduced in size, and are represented by the pollen and the embryo sac. The sporophyte produces spores (hence the name) by meiosis, a process also known as reduction division that reduces the number of chromosomes in each spore mother cell by half.
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- The female gametophyte structure that produces eggs in nonvascular plants are called archegonia. The male structure that produces sperm are called antheridia.
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- Gamete production is the main job of a gametophyte. Gametes are haploid reproductive cells, such as eggs and sperm. They are produced in sex organs on the haploid gametophyte by mitosis, or cellular division without reduction of chromosome sets.
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dominant gene Definitions of dominant gene. 1. “the dominant gene for brown eyes”. (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity.
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Chapter 29 Homework In the life cycle of bryophytes, gametophytes are the dominant stage and are generally larger than sporophytes. The sporophytes of mosses are made up of a foot, a seta, and a sporangium. The foot is embedded in the gametophyte and absorbs nutrients from it.
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- Young sporophytes of the common moss Tortula muralis. In mosses, the gametophyte is the dominant generation, while the sporophytes consist of sporangium-bearing stalks growing from the tips of the gametophytes.A sporophyte (/spɔːroʊˌfaɪt/) is the diploid multicellular stage in the life cycle of a plant or alga.oung sporophytes of the common moss Tortula muralis. In mosses, the gametophyte is the dominant generation, while the sporophytes consist of sporangium-bearing stalks growing from the tips of the gametophytes.
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Sporophyte: Definition & Examples In nonvascular plants like mosses, the sporophyte generation is not the dominant generation. This means that the sporophyte is smaller is size and shorter-lived than the gametophyte generation. When you think of a moss, you probably picture a tiny green leafy plant, like the one shown here. This is the gametophyte generation.
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- A gametophyte is a multicellular haploid generation found in plants and algae that undergo alternation of generations. It produces haploid gametes, or eggs and sperm, usually in gametangia (archegonia and antheridia).
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What is a gametophyte? The alternate phase of the plant life cycle is the sporophyte, the diploid plant form, with each cell containing two complete sets of chromosomes. For example, in mosses the sporophyte is a capsule atop a slender stalk that grows out of the top of the gametophyte.
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Seedless Vascular Plants The life cycle of seedless vascular plants is an alternation of generations, where the diploid sporophyte alternates with the haploid gametophyte phase. The diploid sporophyte is the dominant phase of the life cycle, while the gametophyte is an inconspicuous, but still-independent, organism.