microevolution

(redirected from Micro-evolution)
Also found in: Dictionary, Thesaurus, Encyclopedia.

mi·cro·ev·o·lu·tion

(mī'krō-ev'ŏ-lū'shŭn),
The evolution of bacteria and other microorganisms through mutations.
Farlex Partner Medical Dictionary © Farlex 2012

microevolution

(mī′krō-ĕv′ə-lo͞o′shən, -ē′və-)
n.
Small-scale evolution consisting of genetic changes occurring usually within a single species and over a shorter period of time than in macroevolution.

mi′cro·ev′o·lu′tion·ar′y adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

microevolution

A term of art referring to evolution that occurs below the level of speciation, which corresponds to the shifts in allele frequencies occurring over time in a particular population, regardless of whether it is geographically or ecologically separated from another population.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

microevolution

the small-scale changes resulting from genetic adaptation, that are usually expressed as changes within a species rather than the formation of a new species. see INDUSTRIAL MELANISM.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Mentioned in ?
References in periodicals archive ?
"Micro-evolution" refers to developmental changes within a species, while "macro-evolution" is the transition from one species to another on the basis of mutation and selection.
He starts by stating that, while micro-evolution exists, macro-evolution does not.

Full browser ?