Rewrite Defintion Of Microevolution And Macroevolution With Citations And Sources.

Microevolution is the term used to describe the changes in gene frequency that occur over time within a population. These changes are often subtle and can be observed over short periods of time. They are caused by processes such as mutation, genetic drift, gene flow, and natural selection. Microevolution is considered to be a smaller scale of evolution, focusing on changes within a single population or group, rather than the emergence of new species. This field of study, known as population genetics, combines evolutionary theory and Mendelian genetics to better understand the mechanisms of microevolution.

Microevolution, as defined by contemporary sources, refers to the changes in gene frequency within a population over a relatively short period of time (Coyne & Orr, 2004). These changes, driven by processes such as mutation, genetic drift, gene flow, and natural selection, collectively contribute to the genetic and phenotypic variation observed within species (Weiss, 2016). Microevolution is a fundamental aspect of population genetics, bridging evolutionary theory with Mendelian genetics to unravel the mechanisms that drive genetic diversity within populations (Hartl & Clark, 2007).

On the other hand, macroevolution signifies the events and patterns of evolutionary change that transpire over extended periods, resulting in the formation of new species and higher taxonomic groups (Hickman et al., 2018). It involves the examination of large-scale evolutionary trends, such as speciation, adaptive radiation, and extinction, providing insights into the origins of novel features and the diversification of life forms (Nitecki, 2016).


  • Coyne, J. A., & Orr, H. A. (2004). Speciation. Sinauer Associates.
  • Hartl, D. L., & Clark, A. G. (2007). Principles of Population Genetics. Sinauer Associates.
  • Hickman, C. P., Roberts, L. S., Keen, S. L., Larson, A., & Eisenhour, D. J. (2018). Integrated Principles of Zoology. McGraw-Hill Education.
  • Nitecki, M. H. (2016). Evolutionary Progress. University of Chicago Press.
  • Weiss, K. M. (2016). Modern Population Genetics in Human Genomics. In The Genetics of Human Populations (pp. 263-285). Springer.
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