microevolution


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mi·cro·ev·o·lu·tion

(mī'krō-ev'ŏ-lū'shŭn),
The evolution of bacteria and other microorganisms through mutations.

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.

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.

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.
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References in periodicals archive ?
1990 "Major Features of Sundadonty and Sinodonty, Including Suggestions about East Asian Microevolution, Population History, and Late Pleistocene Relationships with Australian Aboriginals", American Journal of Physical Anthropology, No.
emigration and ethnic intermarriage have taken over as the overwhelmingly dominant forces of microevolution ...
Major features of sundadonty and sinodonty including suggestions about east Asian microevolution, population history and late Pleistocene relationships with Australian aboriginals.
Gould (2002) indicated that the study of microevolution provides little, if any, information about macroevolutionary patterns.
Presented in a debate format, the essays offer different sides of one question, such as whether traits have evolved because of a past advantage, whether species are real, whether selection operates primarily on genes, whether microevolution and macroevolution are governed by the same processes, whether memetics provide a useful way for understanding cultural evolution, whether there is a place for intelligent design in the philosophy of biology, and evolutionary developmental biology versus the neo-Darwinian paradigm.
Genetic analyses showed low diversity, which suggests a slow microevolution. Evaluation of divergence times showed that AHFV and KFDV ancestral lineage diverged 66-177 years ago, and the diversity observed within the studied AHFV strains reflected a 4 to 72-year period of evolution.
On the other hand, it is very important for students to understand the relationship between the process of microevolution at the population level and the changes in gene pools caused by violations of the Hardy-Weinberg assumptions.
Inference of bacterial microevolution using multilocus sequence data.
In this way, the distinction appears to parallel (appropriately enough) the distinction between microevolution and macroevolution in biology.
(5.) Schuffenecker I, Iteman I, Michault A, Murri S, Frangeul L, Genome microevolution of chikungunya viruses causing the Indian Ocean outbreak.
The Bible's depiction of the building of the Tower of Babel, an illustration of experienced language confusion, fits into this concept." Darwin's Mistake is ultimately not just about propounding theories, but also about learning to think critically of the established scientific community's claims--for example, "microevolution" is acknowledged to possibly exist, but "macroevolution", or gigantic changes such as the development of the ability of flight or the ability to breathe air instead of water, remain largely unexplained.
The microevolution of the Galapagos marine iguana Amblyrhynchus cristatus assessed by nuclear and mitochondrial genetic analysis.