enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. List of polymorphisms - Wikipedia

    en.wikipedia.org/wiki/List_of_polymorphisms

    All the flies look alike whatever inversions they carry: this is an example of a cryptic polymorphism. Accordingly, Dobzhansky favoured the idea that the morphs became fixed in the population by means of Sewall Wright's drift. [54] However, evidence rapidly accumulated to show that natural selection was responsible: Drosophila polytene ...

  3. Polymorphism (biology) - Wikipedia

    en.wikipedia.org/wiki/Polymorphism_(biology)

    In biology, polymorphism [1] is the occurrence of two or more clearly different morphs or forms, also referred to as alternative phenotypes, in the population of a species. To be classified as such, morphs must occupy the same habitat at the same time and belong to a panmictic population (one with random mating).

  4. Heterostyly - Wikipedia

    en.wikipedia.org/wiki/Heterostyly

    Heterostyly is a unique form of polymorphism and herkogamy in flowers. In a heterostylous species, two or three morphological types of flowers, termed "morphs", exist in the population. In a heterostylous species, two or three morphological types of flowers, termed "morphs", exist in the population.

  5. Gene polymorphism - Wikipedia

    en.wikipedia.org/wiki/Gene_polymorphism

    Polymorphisms can be identified in the laboratory using a variety of methods. Many methods employ PCR to amplify the sequence of a gene. Once amplified, polymorphisms and mutations in the sequence can be detected by DNA sequencing, either directly or after screening for variation with a method such as single strand conformation polymorphism analysis.

  6. Ecological genetics - Wikipedia

    en.wikipedia.org/wiki/Ecological_genetics

    Examples of such traits include flowering time, drought tolerance, polymorphism, mimicry, and avoidance of attacks by predators. [2] [citation needed] Research usually involves a mixture of field and laboratory studies. [3] Samples of natural populations may be taken back to the laboratory for their genetic variation to be analyzed.

  7. Chromosomal polymorphism - Wikipedia

    en.wikipedia.org/wiki/Chromosomal_polymorphism

    Polymorphism is a general concept in biology where more than one version of a trait is present in a population. In some cases of differing counts, the difference in chromosome counts is the result of a single chromosome undergoing fission , where it splits into two smaller chromosomes, or two undergoing fusion, where two chromosomes join to ...

  8. Heterozygote advantage - Wikipedia

    en.wikipedia.org/wiki/Heterozygote_advantage

    Polymorphism can be maintained by selection favoring the heterozygote, and this mechanism is used to explain the occurrence of some kinds of genetic variability. A common example is the case where the heterozygote conveys both advantages and disadvantages, while both homozygotes convey a disadvantage.

  9. Ecotype - Wikipedia

    en.wikipedia.org/wiki/Ecotype

    Polymorphism are maintained in populations of species by natural selection. [19] [20] In fact, Begon, Townsend, and Harper assert that. There is not always clear distinction between local ecotypes and genetic polymorphisms. The notions "form" and "ecotype" may appear to correspond to a static phenomenon, however; this is not always the case. [21]