BIOL 304 Lecture Notes - Lecture 16: Ecotype, Divergent Evolution, Cultivar
Document Summary
Random neutral substitutions (used to date the coalescence of lineages) Lineages become adapted to different ways of life, and gain different morphological, physiological traits. Opportunities: how many potential different life can the environment provided. Cost of adaptation: a specialized life style may reduces success in other way s of life. Examples of diverged asexual lineages: dandelions, bdelloid rotifers, bacteria (many ecotypes) Species: the sage at which sexual isolation is sufficient to permit substantial divergence; individuals can mate if they are the same species and unlike gender. Recently diverged species have more gene exchange than early diverged species. Recombination of two different functional structures can be detrimental to both. Morph: variety that is distinguished by single genetic difference. Race: variety with restricted geographical distribution (e. g. salamanders in california; sea gulls) Subspecies: race that is strongly and consistently differentiated from others, with a formal taxonomic name formal taxonomic name.
