#evolutionary genetics

• Androdioecious — Pertaining to plants or vegetable species whose populations structurally exhibit two distinct types of individuals: some bearing exclusively male flowers and others bearing only hermaphroditic (bisexual) flowers. This rare reproductive system plays an essential structural role in evolutionary genetics, acting as an intermediate mechanism to promote cross-pollination.
• Anisogamy — A type of sexual reproduction characterized by the fusion of two gametes (sex cells) that are unequal in size, shape, structure, or motor behavior; heterogamy. This biological mechanism represents a higher evolutionary step above isogamy, ensuring a functional specialization whereby the male gamete becomes small and mobile to facilitate searching, while the female gamete becomes large and static, storing nutrient resources for the future embryo.
• Anisohologamy — A particular form of archaic sexual reproduction found in some unicellular organisms, where the entire body of adult individuals transforms directly into gametes that are unequal in size or mobility before fusion. This cytological process represents a form of asymmetric hologamy, where there is no prior differentiation between somatic and germ cells, the fusion occurring directly between disproportionate mature organisms.
• Anisomerogamy — A type of primitive sexual reproduction where fusion occurs between motile gametes that are unequal in size but similar in external structural shape. It represents an intermediate phase in the evolution of cellular reproduction, situated between isogamy (identical gametes) and oogamy (totally differentiated gametes), providing an initial functional differentiation between the smaller male and larger female sex cells.