genitointestinal canal 1. (nemata) see demanian system. 2. (PLATY: Trematoda) A duct connecting the oviduct and intestine of certain Polyopisthocotylea monogeneans.
genito-urinary see urogenital genocline n. [Gr. genos, race; klinein, to slope] Change within a continuous population in frequencies of genotypes in different geographical areas.
genocopy n. [Gr. genos, race; L. copia, abundance] Production of the same phenotype by different genes (mimetic genes).
genodeme n. [Gr. genos, race; demos, people] A deme.
genoholotype n. [Gr. genos, race; holos, whole; typos, type] A typical species specified by the author as the generic type.
genolectotype n. [Gr. genos, race; lektos, chosen; typos, type] The type of a genus selected from a series of species placed in the genus subsequent to the description.
genome n. [Gr. genos, race; soma, body] The genes carried by a single gamete; the genetic contents of the chromosomes.
genostyles n.pl. [Gr. genos, race; stylos, pillar] (ARTHRO: In-secta) In male Ephemeroptera, genital projections (consisting of 1-7 segments) initiated from the posterior corners of the 9th segment, functioning during copulation.
genosyntype n. [Gr. genos, race; syn-, together; typos, type] Any one of a series of species that a genus is based upon when no one species was established as type. see type.
genotype n. [Gr. genos, race; typos, type] 1. The genetic constitution of an organism or taxon, regardless of the outward appearance (phenotype) of the same. 2. Incorrect synonym for type species.
genovertical plate (ARTHRO: Insecta) In Diptera, the area on the head above the antenna and next to the compound eye; the orbital plate; the parafrontals.
genu n.; pl. genua [L. genu, knee] 1. Any structure or organ with a knee-like bend. 2. (ARTHRO: Chelicerata) In Acari, the segment between the femur and tibia that is activated by its own muscles and tendons, corresponding with the patella in other groups of Chelicerata.
genus n.; pl. genera [L. genus, race] A taxon including one species or a group of species from a presumed common ancestor, separated from related similar genera by a decided gap; a taxonomic category above species and next below the family group.
genus novum A new genus, never before described; gen. nov.
geobionts n. [Gr. ge, earth; bios, life; on, a being] Organisms that permanently inhabit the soil and thereby affect its structure. see geocoles.
geobios n. [Gr. ge, earth; bios, life] Soil life; terrestrial life. see edaphon.
geochronology n. [Gr. ge, earth; chronos, time; logos, discourse] The measurement of time in relation to the evolution of the earth.
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