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  2. Polar bear - Wikipedia

    en.wikipedia.org/wiki/Polar_bear

    The polar bear (Ursus maritimus) is a large bear native to the Arctic and nearby areas. It is closely related to the brown bear, and the two species can interbreed.The polar bear is the largest extant species of bear and land carnivore, with adult males weighing 300–800 kg (660–1,760 lb).

  3. Gene cluster - Wikipedia

    en.wikipedia.org/wiki/Gene_cluster

    Gene conversion is the only method in which gene clusters may become homogenized. Although the size of a gene cluster may vary, it rarely comprises more than 50 genes, making clusters stable in number. Gene clusters change over a long evolutionary time period, which does not result in genetic complexity. [10]

  4. Polar mutation - Wikipedia

    en.wikipedia.org/wiki/Polar_mutation

    A polar mutation affects expression of downstream genes or operons.It can also affect the expression of the gene in which it occurs, if it occurs in a transcribed region. These mutations tend to occur early within the sequence of genes and can be nonsense, frameshift, or insertion mutatio

  5. Gene family - Wikipedia

    en.wikipedia.org/wiki/Gene_family

    Phylogenetic tree of the Mup gene family. A gene family is a set of several similar genes, formed by duplication of a single original gene, and generally with similar biochemical functions. One such family are the genes for human hemoglobin subunits; the ten genes are in two clusters on different chromosomes, called the α-globin and β-globin loci

  6. List of genetic hybrids - Wikipedia

    en.wikipedia.org/wiki/List_of_genetic_hybrids

    The naming of hybrid animals depends on the sex and species of the parents. The father giving the first half of his species' name and the mother the second half of hers. (I.e. a pizzly bear has a polar bear father and grizzly bear mother whereas a grolar bear's parents would be reversed.)

  7. Ursid hybrid - Wikipedia

    en.wikipedia.org/wiki/Ursid_hybrid

    Possible hybridisation between different species of bear. An ursid hybrid is an animal with parents from two different species or subspecies of the bear family (Ursidae).Species and subspecies of bear known to have produced offspring with another bear species or subspecies include American black bears, grizzly bears, and polar bears, all of which are members of the genus Ursus.

  8. Population structure (genetics) - Wikipedia

    en.wikipedia.org/wiki/Population_structure...

    Population structure (also called genetic structure and population stratification) is the presence of a systematic difference in allele frequencies between subpopulations.In a randomly mating (or panmictic) population, allele frequencies are expected to be roughly similar between groups.

  9. Regional differentiation - Wikipedia

    en.wikipedia.org/wiki/Regional_differentiation

    The same gap gene can act positively in one stripe but negatively in another. The expression of the pair-rule genes translate into the expression of the segment polarity genes in 14 stripes. The role of the segment polarity genes is to define to boundaries and the polarity of the segments.

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