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Development of Plant Gametes definitions

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  • Unisexual
    Describes organisms containing only male or only female organs, not both, commonly seen in humans and some plants.
  • Bisexual
    Refers to organisms possessing both male and female organs, allowing for self-fertilization in many plant species.
  • Intersex
    Indicates an intermediate or mixed sexual condition, often resulting in sterility due to atypical organ development.
  • Primary Sexual Differentiation
    Classification based on the type of gametes produced, such as eggs or pollen, not visible externally.
  • Secondary Sexual Differentiation
    Classification based on visible sexual organs, allowing external identification of male or female structures.
  • Gametophyte
    Haploid stage in the plant life cycle, arising from spores and responsible for producing gametes.
  • Sporophyte
    Diploid stage in the plant life cycle, generating haploid spores through meiosis.
  • Microspore
    Haploid cell formed by meiosis in male organs, which divides to produce pollen grains.
  • Megaspore
    Haploid cell produced by meiosis in female organs, with typically one surviving to form the embryo sac.
  • Stamen
    Male reproductive organ in flowers, containing microsporocytes that give rise to pollen.
  • Stigma
    Part of the female reproductive organ in flowers, serving as the landing site for pollen.
  • Embryo Sac
    Female gametophyte structure in flowering plants, containing eight haploid nuclei after mitotic divisions.
  • Zygote
    Diploid cell resulting from the fusion of male and female gametes, initiating the next sporophyte generation.
  • Isogamete
    Gametes that are morphologically indistinguishable but differ internally, as seen in certain algae.
  • Mating Type
    Genetic classification in some algae, such as MT+ and MT-, determining compatibility for fusion.