Where does meiosis occur in a mushroom?
In the mushroom, meiosis occurs in a synchronous fashion, sweeping across the gill surfaces underneath the cap, reconfiguring and sorting the chromosomes within 10 million spore-producing cells called basidia (inset).
Where does meiosis occur in the life cycle of a moss?
Life cycle of a moss (genus Polytrichum). The sporophyte generation is dependent on the photosynthetic gametophyte for nutrition. Cells within the sporangium of the sporophyte undergo meiosis to produce male and female spores, respectively.
Which type of meiosis takes place during the life cycle of fungi?
Meiosis (reduction division) restores the haploid number of chromosomes and initiates the haploid phase, which produces the gametes. In the majority of fungi, all structures are haploid except the zygote. Nuclear fusion takes place at the time of zygote formation, and meiosis follows immediately.
Where does meiosis occur in a mushroom quizlet?
Where does meiosis occur in a mushroom? Basidia are specialized cells in the gills of a mushroom in which haploid nuclei fuse in preparation for meiosis.
Where does mitosis occur in fungi?
Fungi and some protists, such as algae or trichomonads, undergo a variation called closed mitosis where the spindle forms inside the nucleus, or the microtubules penetrate the intact nuclear envelope.
What is the life cycle of a moss?
The life cycle of a moss, like all plants, is characterized by an alternation of generations. A diploid generation, called the sporophyte, follows a haploid generation, called the gametophyte, which is in turn followed by the next sporophyte generation.
What do the moss life cycle and the fern life cycle have in common?
In both mosses and ferns, moisture is required for sperm to reach the egg. In mosses, the gametophyte is the dominant stage of the life cycle; in ferns, the sporophyte is the dominant stage of the life cycle. mature sporophytes produce haploid spores, dispersed by the wind.
Where does meiosis occur in animals?
Sexual reproduction uses the process of meiosis , which creates gametes . These are sperm and eggs (ova) in animals, and pollen and ova in plants. The process of meiosis happens in the male and female reproductive organs.
Where does mitosis and meiosis happen?
Mitosis occurs in somatic cells; this means that it takes place in all types of cells that are not involved in the production of gametes. Prior to each mitotic division, a copy of every chromosome is created; thus, following division, a complete set of chromosomes is found in the nucleus of each new cell.
Which type of meiosis takes place in the life cycle of algae?
zygotic meiosis
The life cycle seen in most of the algae is called the haplontic life cycle. Zygote represents the diploid sporophyte generation. The zygote undergoes meiotic division to form haploid spores and thus zygotic meiosis occurs in most algae.
Where in the life cycle does Plasmogamy occur?
Fungal Life Cycles In most other familiar types of organisms, such as plants and animals, plasmogamy and karyogamy occur in rapid succession and are usually referred to as the single event of fertilization.
What are the characteristics of the pine tree life cycle?
Characteristics of the life cycle The female and male inflorescence of the pine tree develop as cones on the sporophyte. The female cones (female strobili, singular strobilus) consist of megasporophylls that carry uncovered (Gymno = naked / exposed, hence Gymnosperms) ovules. The female strobili (singular strobilus) of Gymnosperms contain ovules.
How are the microspores of a pine tree formed?
Each microsporocyte forms four microspores through a meiotic division. Subsequently, each microspore forms a pollen grain (the microgametophyte) through mitosis. H Detail of a germinated pollen grain of pine, with a pollen tube. The female strobili (singular strobilus) of Gymnosperms contain ovules.
Which is the female carrier of spores in the pine tree?
In each megasporangium (the female carrier of spores) a megasporocyte is present which leads to four megaspores after meiosis. three of these megaspores degenerate, only one megaspore is functional and forms the megagametophyte with two or three archegonia containig each one egg cell. B Female cones.
When does fertilization take place in a mushroom?
In most fungi, fertilization is complete after the cells fuse together. in most fungi, fertilization is a two-step process consisting of the fusion of cells and then the fusion of nuclei in the fused cells. Where does meiosis occur in a mushroom?
