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单词 quasispecies
释义

Definition of quasispecies in English:

quasispecies

noun ˈkweɪzʌɪˌspiːsɪzˈkwɑːziˌspiːʃɪzˈkweɪzʌɪˌspiːʃɪz
Biology
  • 1A race or type of plant or animal which appears superficially to be a distinct species, or is named by some as though it were such, but is regarded (especially by later workers) as not warranting such status. Also in extended use. Now rare.

  • 2Originally (in models of evolutionary selection): a group of similar but non-identical DNA or RNA molecules, with a distribution centred on a hypothetically ideal sequence, resulting from a balance between mutation and selection pressure. In later use also: a population of viruses with genomic sequences of this nature.

Origin

Mid 19th century; earliest use found in Hewett Watson (1804–1881), botanist and phrenologist. From quasi + species.

Definition of quasispecies in US English:

quasispecies

noun
Biology
  • 1A race or type of plant or animal which appears superficially to be a distinct species, or is named by some as though it were such, but is regarded (especially by later workers) as not warranting such status. Also in extended use. Now rare.

  • 2Originally (in models of evolutionary selection): a group of similar but non-identical DNA or RNA molecules, with a distribution centred on a hypothetically ideal sequence, resulting from a balance between mutation and selection pressure. In later use also: a population of viruses with genomic sequences of this nature.

Origin

Mid 19th century; earliest use found in Hewett Watson (1804–1881), botanist and phrenologist. From quasi + species.

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更新时间:2025/7/17 8:58:18