Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A group of organisms once (but no longer) thought to be a separate species (and sometimes given such a name)
  • n. A group of similar nucleic acid molecules; a group of viruses having such similar genomes

Etymologies

Sorry, no etymologies found.

Examples

  • This ensemble of closely related RNAs is called a quasispecies.

    SuperCooperators

  • HIV-1 operates as a 'quasispecies', that is, a large population of genetically distinct, yet related organisms.

    ScienceBlogs Channel : Life Science

  • It is easy to see why the idea of the quasispecies, a grouping of slightly different but related RNA molecules, is so powerful.

    SuperCooperators

  • There are other important consequences of quasispecies theory.

    SuperCooperators

  • Moreover, the highest peak may not correspond to the fittest quasispecies, as will become clear.

    SuperCooperators

  • But Eigen and Schuster argued that the target of natural selection is not the fittest sequence but the fittest quasispecies.

    SuperCooperators

  • When Eigen and Schuster introduced quasispecies theory in the late 1970s, they created new opportunities to understand life and evolution.

    SuperCooperators

  • In this way, natural selection picks the fittest cloud of RNAs quasispecies rather than the fittest RNA sequence itself.

    SuperCooperators

  • There is a critical mutation rate, below which A is the winner, but above which B and its neighbors are favored, and this can be worked out with the “quasispecies equation.”

    SuperCooperators

  • This is an important distinction because the fittest sequence may only represent a very small fraction of the quasispecies.

    SuperCooperators

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