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Gametes are an organism's reproductive cells, also referred to as sex cells. [2] The name gamete was introduced by the German cytologist Eduard Strasburger in 1878. [3] Gametes of both mating individuals can be the same size and shape, a condition known as isogamy.
1: Pedicel 2: Receptacle 3: Nectary 4: Sepal 5: Petal 6: Filament 7: Anther 8: Stigma 9: Style 10: Ovary 11: Ovule 12: Bract The flower, which is one of the defining features of angiosperms, is essentially a stem whose leaf primordia become specialised, following which the apical meristem stops growing: a determinate growth pattern, in contrast ...
[2] [page needed] Seeds generated by apomixis are a means of asexual reproduction, involving the formation and dispersal of seeds that do not originate from the fertilization of the embryos. Hawkweeds (Hieracium), dandelions (Taraxacum), some species of Citrus and Kentucky blue grass (Poa pratensis) all use this form of asexual reproduction.
Gametogenesis is a biological process by which diploid or haploid precursor cells undergo cell division and differentiation to form mature haploid gametes.Depending on the biological life cycle of the organism, gametogenesis occurs by meiotic division of diploid gametocytes into various gametes, or by mitosis.
Gametogenesis is the formation or production of gametes (taking place during meiosis). The development and maturation of sex cells also takes place during meiosis. Gametogenesis is also the process of formation in male and female gametes that occur in the gonads (ovary and testis). Both male and female produce gametes.
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Automixis [1] is the fusion of (typically haploid) nuclei or gametes derived from the same individual. [2] The term covers several reproductive mechanisms, some of which are parthenogenetic. [3] Diploidy might be restored by the doubling of the chromosomes without cell division before meiosis begins or after meiosis is completed.
In order to study mammalian meiosis, a culture technique that would allow for this process to be observed live under a microscope would need to be identified. [2] By viewing live mammalian meiosis, one can observe the behavior of mutant meiocytes that may possibly compromise infertility within the particular organism. [ 2 ]
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