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  2. Inbred strain - Wikipedia

    en.wikipedia.org/wiki/Inbred_strain

    The Japanese Medaka fish has a high tolerance for inbreeding, one line having been bred brother-sister for as many as 100 generations without evidence of inbreeding depression, providing a ready tool for laboratory research and genetic manipulations. Key features of the Medaka that make it valuable in the laboratory include the transparency of ...

  3. Inbreeding - Wikipedia

    en.wikipedia.org/wiki/Inbreeding

    Inbreeding results in homozygosity which can increase the chances of offspring being affected by recessive traits. [3] In extreme cases, this usually leads to at least temporarily decreased biological fitness of a population [ 4 ] [ 5 ] (called inbreeding depression ), which is its ability to survive and reproduce.

  4. Runs of homozygosity - Wikipedia

    en.wikipedia.org/wiki/Runs_of_Homozygosity

    Runs of homozygosity (ROH) are contiguous lengths of homozygous genotypes that are present in an individual due to parents transmitting identical haplotypes to their offspring. [ 1 ] The potential of predicting or estimating individual autozygosity for a subpopulation is the proportion of the autosomal genome above a specified length, termed F ...

  5. F1 hybrid - Wikipedia

    en.wikipedia.org/wiki/F1_hybrid

    Inbreeding and selection for uniformity for multiple generations ensures that the parent lines are almost homozygous. The divergence between the (two) parent lines promotes improved growth and yield characteristics in offspring through the phenomenon of heterosis ("hybrid vigour" or "combining ability").

  6. Zygosity - Wikipedia

    en.wikipedia.org/wiki/Zygosity

    The words homozygous, heterozygous, and hemizygous are used to describe the genotype of a diploid organism at a single locus on the DNA. Homozygous describes a genotype consisting of two identical alleles at a given locus, heterozygous describes a genotype consisting of two different alleles at a locus, hemizygous describes a genotype consisting of only a single copy of a particular gene in an ...

  7. Inbreeding depression - Wikipedia

    en.wikipedia.org/wiki/Inbreeding_depression

    Among animals, inbreeding avoidance is highly variable. [8] Inbreeding avoidance through mate selection appears to evolve only when there is both a risk of inbreeding depression and there also are frequent encounters between potential sexual partners that are related to each other. [8]

  8. F-statistics - Wikipedia

    en.wikipedia.org/wiki/F-statistics

    The concept of F-statistics was developed during the 1920s by the American geneticist Sewall Wright, [1] [2] who was interested in inbreeding in cattle. However, because complete dominance causes the phenotypes of homozygote dominants and heterozygotes to be the same, it was not until the advent of molecular genetics from the 1960s onwards that ...

  9. Partial dominance hypothesis - Wikipedia

    en.wikipedia.org/wiki/Partial_dominance_hypothesis

    In genetics, the partial dominance hypothesis states that inbreeding depression is the result of the frequency increase of homozygous deleterious recessive or partially recessive alleles. The hypothesis can be explained by looking at a population that is divided into a large number of separately inbred lines.

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