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  2. Meiosis - Wikipedia

    en.wikipedia.org/wiki/Meiosis

    In land plants and some algae, there is an alternation of generations such that meiosis in the diploid sporophyte generation produces haploid spores instead of gametes. When they germinate, these spores undergo repeated cell division by mitosis, developing into a multicellular haploid gametophyte generation, which then produces gametes directly ...

  3. Cell division - Wikipedia

    en.wikipedia.org/wiki/Cell_division

    Meiosis undergoes two divisions resulting in four haploid daughter cells. Homologous chromosomes are separated in the first division of meiosis, such that each daughter cell has one copy of each chromosome. These chromosomes have already been replicated and have two sister chromatids which are then separated during the second division of ...

  4. Embryonic sac - Wikipedia

    en.wikipedia.org/wiki/Embryonic_sac

    A megaspore mother cell, or megasporocyte, is a diploid cell in plants in which meiosis will occur, resulting in the production of four haploid megaspores. At least one of the spores develop into haploid female gametophytes, the megagametophytes. [1] The megaspore mother cell arises within the megasporangium tissue.

  5. Megagametogenesis - Wikipedia

    en.wikipedia.org/wiki/Megagametogenesis

    Megagametogenesis is the process of maturation of the female gametophyte, or megagametophyte, in plants. [1] 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]

  6. Reproduction - Wikipedia

    en.wikipedia.org/wiki/Reproduction

    The meiosis stage of the sexual cycle also allows especially effective repair of DNA damages (see Meiosis). [29] In addition, sexual reproduction usually results in the formation of a life stage that is able to endure the conditions that threaten the offspring of an asexual parent.

  7. Microgametogenesis - Wikipedia

    en.wikipedia.org/wiki/Microgametogenesis

    Microgametogenesis is the process in plant reproduction where a microgametophyte develops in a pollen grain to the three-celled stage of its development. In flowering plants it occurs with a microspore mother cell inside the anther of the plant.

  8. Germ cell - Wikipedia

    en.wikipedia.org/wiki/Germ_cell

    There, they undergo meiosis, followed by cellular differentiation into mature gametes, either eggs or sperm. Unlike animals, plants do not have germ cells designated in early development. Instead, germ cells can arise from somatic cells in the adult, such as the floral meristem of flowering plants. [1] [2] [3]

  9. Neurospora crassa - Wikipedia

    en.wikipedia.org/wiki/Neurospora_crassa

    Meiosis is an essential part of the life cycle of all sexually reproducing organisms, and in its main features, meiosis in N. crassa seems typical of meiosis generally. As the above events are occurring, the mycelial sheath that had enveloped the ascogonium develops as the wall of the perithecium, becomes impregnated with melanin, and blackens.