Microevolution

From WikiMD's Wellness Encyclopedia

(Redirected from Microevolutionary)

Microevolution refers to changes in gene frequency in a population from one generation to the next and to the processes that cause those changes. These processes include mutation, non-random mating, gene flow, genetic drift, and natural selection.

Definition[edit | edit source]

Microevolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift.

Processes[edit | edit source]

Mutation[edit | edit source]

Mutation is a change in a DNA sequence, usually occurring because of errors in replication or repair. Mutation can introduce new genetic variation into the gene pool of a population.

Selection[edit | edit source]

Selection is the process by which certain phenotypes are favored to survive and reproduce over others. Selection can be divided into three types:

  • Natural selection: It favors the survival of organisms that are best adapted to their environment.
  • Artificial selection: It involves humans selecting for desirable traits in organisms.
  • Sexual selection: It involves organisms selecting mates based on certain traits.

Gene Flow[edit | edit source]

Gene flow is the transfer of genetic variation from one population to another. If the rate of gene flow is high enough, then two populations are considered to have equivalent allele frequencies and therefore effectively be a single population.

Genetic Drift[edit | edit source]

Genetic drift is the change in allele frequency from one generation to the next that occurs due to chance. This is particularly important in small populations where chance events can have a larger impact on the gene pool.

See Also[edit | edit source]

References[edit | edit source]


Microevolution Resources
Wikipedia
WikiMD
Navigation: Wellness - Encyclopedia - Health topics - Disease Index‏‎ - Drugs - World Directory - Gray's Anatomy - Keto diet - Recipes

Search WikiMD

Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD

WikiMD's Wellness Encyclopedia

Let Food Be Thy Medicine
Medicine Thy Food - Hippocrates

Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.

Contributors: Prab R. Tumpati, MD