English

Noun

orthoselection ‎(uncountable)

1. (biology, historical) The hypothesis that posits that orthogenesis works by means of natural selection.
2. (genetics) The acquisition of a common series of rearrangements within a genetic lineage.
   • "Chromosomal Changes and Stasis in Marine Fish Groups" in Fish Cytogenetics, Wagner Franco Molina, p. 83:

     Therefore, there is evidence that orthoselection (sensu White, 1973) takes place in a karyotypic format in some lineages and particular formats in others, and could be associated with specific adaptive values that have obvious evolutionary connotations.