自然界のドロソフィラハイブリッド:共感性の種間の遺伝子交換の証拠

関連する実験動画

Updated: Jul 20, 2026

Recombineering Homologous Recombination Constructs in Drosophila
14:23

Recombineering Homologous Recombination Constructs in Drosophila

Published on: July 13, 2013

H L Carson, P S Nair, F M Sene

    Science (New York, N.Y.)
    |September 5, 1975
    PubMed
    まとめ

    ハワイの2つの種間のハイブリッド化はまれで,個体のわずか2%がハイブリッドである. これは,自然選択が偶発的な交配にもかかわらず,種の完全性を保ち,明確な遺伝子プールを維持することを示唆しています.

    さらに関連する動画

    Rearing the Fruit Fly Drosophila melanogaster Under Axenic and Gnotobiotic Conditions09:34

    Rearing the Fruit Fly Drosophila melanogaster Under Axenic and Gnotobiotic Conditions

    Published on: July 30, 2016

    A Drosophila Model to Study Wound-induced Polyploidization07:27

    A Drosophila Model to Study Wound-induced Polyploidization

    Published on: June 9, 2020

    関連する概念動画

    Understanding Species and Reproductive Barriers01:17

    Understanding Species and Reproductive Barriers

    A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...
    Formation of Species01:31

    Formation of Species

    Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.Allopatric SpeciationIn allopatric speciation, gene flow between two populations of the same species is prevented by a geographic barrier, like...
    Mutation, Gene Flow, and Genetic Drift01:09

    Mutation, Gene Flow, and Genetic Drift

    In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).Mechanisms of Genetic VariationThe original sources of genetic variation are mutations,...
    Genetics of Speciation02:16

    Genetics of Speciation

    Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...
    Hybrid Zones02:29

    Hybrid Zones

    Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.Gene flow and natural selection are evolutionary mechanisms that shape the outcome of a hybrid zone. Gene flow...
    Gene Flow02:39

    Gene Flow

    Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.