#genetics

• Autoallogamy — A specialized biological term defining the adaptive capacity or phenomenon whereby a plant species structurally combines autogamy (self-pollination) with allogamy (cross-pollination); a flexible reproductive strategy allowing plants to resort to fertilization with own pollen in the absence of external pollination vectors, while maintaining cross-breeding capabilities.
• Autosome — A scientific term synonymous with autosome; any of the somatic chromosomes of an organism that is identical in structure and number in both sexes, as opposed to heterochromosomes or sex chromosomes (allosomes). Humans possess a structural set of 22 pairs of autochromosomes that store and transmit non-sexual hereditary information.
• Self-fertilization — The act of self-fertilizing and its result; the biological process of fusing male and female sexual elements produced by the same individual organism. In botany, this phenomenon is also known as autogamy and is considered an efficient reproductive strategy in unstable environments, though it reduces the genetic variability of offspring.
• Self-fertilized — Regarding plants, flowers, or hermaphroditic organisms: self-fertilized, self-pollinated; having been fertilized with its own pollen or reproductive elements without genetic material from another individual. In a technical sense, it describes the state of an ovule or seed resulting from autogamy, forming the basis of pure lines in artificial selection.
• Self-fertility — The intrinsic capacity of a plant, variety, or hermaphroditic organism to produce viable fruits, seeds, or offspring through self-pollination or self-fertilization, without external genetic input. In agricultural sciences, it represents a genetic trait of great economic importance, ensuring constant crop productivity regardless of climatic conditions or the absence of pollination vectors.
• Autophylogeny — A theoretical concept or rare scientific neologism used to describe the historical evolution and phylogenetic development of an isolated genetic lineage or species, based exclusively on its own gene pool and without influences from external gene flow or hybridization. In macroevolutionary analyses, the term emphasizes strictly endogenous genetic drift and speciation within a completely closed habitat.
• Autogamous — Reproducing through autogamy; a botanical and biological term describing an organism, specifically a plant or flower, whose male reproductive structures fertilize its own female reproductive structures. This genetic phenomenon ensures the perpetuation of the species in isolated environments where external pollinators or wind vectors are absent, leading to a high degree of homozygosity within those populations.
• Autogamous — The feminine form of the adjective autogamous; it characterizes a plant species, a flower, or a biological population within which reproduction occurs exclusively or predominantly through self-fertilization. In plant genetics, an autogamous line is utilized to obtain genetically pure organisms, eliminating the risks of unpredictable variations brought by foreign pollen.
• Autogamy — A mode of reproduction characteristic of certain plants and lower organisms, consisting of self-fertilization or self-pollination, a process whereby the fusion of gametes originates from the same individual. This evolutionary biological mechanism guarantees the genetic stability of the species and its perpetuation in isolated or harsh habitats, eliminating structural reliance on external factors such as pollinating insects, wind, or water, although it limits long-term genetic diversity and recombination.
• Autogenetic — Pertaining to or relating to autogenesis; originating, developing, or generated from within the same organism or system, without direct external environmental influence or input from another individual. In a molecular sense, the term describes self-regulated biological processes or cellular structures that modify or replicate based on their own constitutive hereditary code.
• Autogenotypic — Relating to or determined exclusively by the specific genotype of a single organism; independent of external genetic variations or crosses with other genetic lines. In theoretical genetics, the term describes characteristics, mutations, or replication processes governed strictly by the intrinsic hereditary constitution of that specific individual, free from allogenic influences.
• Autohomogamy — A biological phenomenon and reproductive mechanism found in certain plant species or lower organisms, characterized by the simultaneous maturation of male and female sexual organs (androecium and gynoecium) within the same flower or individual, directly facilitating mandatory self-fertilization. This strict temporal correlation guarantees reproductive success in isolated environments but severely limits the genetic diversity of the offspring.
• Automixis — A modified form of sexual reproduction or self-fertilization characterized by the fusion of two haploid nuclei originating from the same mother cell or the same individual, without the intervention of any external gamete. In genetics and mycology, this biological process ensures the perpetuation of the species under extreme ecological isolation, allowing the restoration of the zygote's diploid state from a single lineage, though it reduces the genetic variability of offspring.
• Automictic parthenogenesis — A form of parthenogenesis (virgin reproduction) in which an egg cell develops without being fertilized by a sperm cell, but diploidy (the full chromosome count) is spontaneously restored through an internal meiotic or mitotic mechanism, such as the fusion of the egg with its own polar body or nuclear chromosome duplication. This endogenous structural process ensures the complete transmission of maternal genetic material, generating offspring that are genetically partial or total clones of the mother.
• Autoplasia — A biological or histological phenomenon theorized in cell culture studies and experimental oncology, describing the intrinsic capacity of certain tissues or cells to replicate, differentiate, or structurally reorganize completely autonomously, based on an endogenous genetic program independent of the systemic, hormonal, or signaling regulatory factors of the host organism.
• Self-pollination — A biological reproductive process in spermatophyte plants, characterized by the transfer of pollen grains from the anthers to the stigma of the same flower (autogamy) or of another flower belonging to the same individual (geitonogamy). This endogenous structural mechanism ensures fertilization in the absence of external pollination vectors, but limits the genetic variability of the offspring by increasing homozygosity.
• Autopolyploid — An organism or cell possessing more than two complete sets of homologous chromosomes (triploid, tetraploid, etc.), derived entirely from the multiplication of the genome of the same species, without the input of foreign genetic material. This structural genomic mutation phenomenon usually occurs through chromosome non-disjunction during meiosis or mitosis, serving as a major evolutionary driver in the plant kingdom, responsible for the emergence of varieties with enhanced productivity and resilience.
• Autopolyploidy — A structural genomic state or mutation characterized by the presence of more than two complete sets of homologous chromosomes within the cell nucleus, derived entirely from the same species due to endogenous duplication of genetic material without interspecific hybridization. This phenomenon occurs through the disruption of cell division (mitotic or meiotic non-disjunction) and plays a major role in the evolution and diversification of the plant kingdom, frequently causing morphological changes such as increased cell and organ size, as well as enhanced plant resilience.
• Autoradiogram — The final image, photographic plate, or digital representation obtained through the process of autoradiography, containing visual maps of the radioactive emission points from the analyzed sample. In molecular genetics, this graphic structure highlights discrete bands corresponding to DNA fragments or proteins separated by electrophoresis, serving as an essential scientific document in genome sequencing.
• Autosyndesis — A genetic mechanism during meiosis in polyploid, particularly allopolyploid, organisms, characterized by the pairing (synapsis) and conjugation of homologous chromosomes derived from the same parental set or from the same ancestral species. This structural phenomenon differs from allosyndesis and plays a crucial role in maintaining genomic stability and determining inheritance patterns in complex plant hybrids.