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- The sporangium in the ovary (where the female gametophyte will be formed) is called the megasporangium. Diploid microspore mother cells in the microsporangium and diploid megaspore mother cells in the megasporangium divide by meiosis to form four haploid micro- or mega- spores. These spores initiate the gametophyte phase.
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How do haploid megaspores form a gametophyte?
How does megasporangium produce haploid sporophyte?
How does a megaspore mother cell divide?
How does a megaspore develop into a sporophyte?
Which spore divides to form a multicellular female gametophyte?
What is a haploid gametophyte?
The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium.
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Jul 27, 2022 · Diploid microspore mother cells in the microsporangium and diploid megaspore mother cells in the megasporangium divide by meiosis to form four haploid micro- or mega- spores. These spores initiate the gametophyte phase.
Oct 31, 2023 · The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure.
Apr 28, 2018 · They are haploid cells that are produced by meiosis in sporophytes. Upon germination, the haploid spores undergo mitosis to form a multicellular gametophyte structure. The mature haploid gametophyte then produces gametes by mitosis. This process differs from what is seen in animal organisms.
- Regina Bailey
Haploid gametophyte formation and double fertilization. Mitosis after meiosis leads to the formation of female gametophytes and male gametophytes (pollen). One haploid sperm cell (SC) fertilizes the haploid egg cell (EC).
Megagametogenesis is development of the female gametophyte from the haploid product(s) of meiosis. The particular type of megagametogenesis is a function of mitotic divisions, the formation of new cells, and the fusion of existing nuclei or cells. This sequence of events defines what are termed female gametophyte (or embryo sac) types.
During the process of megagametogenesis, the megaspore, which arises from megasporogenesis, develops into the embryonic sac, in which the female gamete is housed. [2] These megaspores then develop into the haploid female gametophytes. [2] This occurs within the ovule, which is housed inside the ovary.
