enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. 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 ...

  3. Major histocompatibility complex and sexual selection

    en.wikipedia.org/wiki/Major_histocompatibility...

    MHC-based sexual selection is known to involve olfactory mechanisms in such vertebrate taxa as fish, mice, humans, primates, birds, and reptiles. [1] At its simplest level, humans have long been acquainted with the sense of olfaction for its use in determining the pleasantness or the unpleasantness of one's resources, food, etc.

  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. Inbreeding - Wikipedia

    en.wikipedia.org/wiki/Inbreeding

    Homozygosity is the case where similar or identical alleles combine to express a trait that is not otherwise expressed (recessiveness). Inbreeding exposes recessive alleles through increasing homozygosity. [59] Breeders must avoid breeding from individuals that demonstrate either homozygosity or heterozygosity for disease causing alleles. [60]

  6. Hardy–Weinberg principle - Wikipedia

    en.wikipedia.org/wiki/Hardy–Weinberg_principle

    A common cause of non-random mating is inbreeding, which causes an increase in homozygosity for all genes. If a population violates one of the following four assumptions, the population may continue to have Hardy–Weinberg proportions each generation, but the allele frequencies will change over time.

  7. Genetic engineering techniques - Wikipedia

    en.wikipedia.org/wiki/Genetic_engineering_techniques

    Homozygosity must be confirmed in second generation specimens. Early techniques randomly inserted the genes into the genome. Advances allow targeting specific locations, which reduces unintended side effects. Early techniques relied on meganucleases and zinc finger nucleases. Since 2009 more accurate and easier systems to implement have been ...

  8. Genetic viability - Wikipedia

    en.wikipedia.org/wiki/Genetic_viability

    [1] [2] The term is generally used to mean the chance or ability of a population to avoid the problems of inbreeding. [1] Less commonly genetic viability can also be used in respect to a single cell or on an individual level. [1] Inbreeding depletes heterozygosity of the genome, meaning there is a greater chance of identical alleles at a locus. [1]

  9. Inbreeding depression - Wikipedia

    en.wikipedia.org/wiki/Inbreeding_depression

    For the alleles that confer an advantage in the heterozygous and/or homozygous-dominant state, the fitness of the homozygous-recessive state may even be zero (meaning sterile or unviable offspring). An example of inbreeding depression is shown in the image. In this case, a is the recessive allele which has negative effects.