sexual generation


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generation

 [jen″er-a´shun]
1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.
alternate generation reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation (direct generation) production of a new organism not originating from union of gametes.
first filial generation the first-generation offspring of two parents; symbol F1.
parental generation the generation with which a particular genetic study is begun; symbol P1.
second filial generation all of the offspring produced by two individuals of the first filial generation; symbol F2.
sexual generation production of a new organism from the cell formed by the union of a male gamete (spermatozoon) and a female gamete (oocyte).
spontaneous generation the discredited concept of continuous generation of living organisms from nonliving matter.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

sex·u·al gen·er·a·tion

reproduction by conjugation, or the union of male and female cells, as opposed to asexual generation.
Farlex Partner Medical Dictionary © Farlex 2012

sex·u·al gen·er·a·tion

(sek'shū-ăl jen'ĕr-ā'shŭn)
Reproduction by conjugation, or the union of male and female cells, as opposed to asexual generation.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Sexual generation. Single galls develop in apical or lateral buds on young shoots, never in clusters.
The loss of the sexual generation resulting in a species with only a single asexual generation per year is exceedingly rare, being confirmed from only 3 species within the entire radiation of approximately 1,400 species of Cynipini (Csoka et al.
Alternate asexual and sexual generations are known, both developing on Quercus virginiana Mill., Q.
The category 'sexual generation' encompassed haploid individuals producing gametes by mitosis and diploid individuals producing gametes by meiosis.
However, if it were assumed that chromosome reduction occurred immediately before the production of zoospores by generation C, then generation C would be analogous, perhaps even homologous, to the sporophyte of mosses (i.e., a multicellular body with the doubled number of chromosomes growing attached to a sexual generation with the reduced number of chromosomes).
Selfing rate is thus unambiguously defined as the proportion of selfed matings in the sexual generation. This is equivalent to the relative selfing rate of the proportional model, and to the usual definition of selfing rate in partially asexual plant populations.
The increase in average mutational load and inbreeding depression with increasing asexuality may be attributed to the increase in mutation rate per sexual generation, but that alone is insufficient to explain the overall pattern of inbreeding depression seen.