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Agents of Evolutionary Change
Agents of Evolutionary Change

... Mutations create variation in gene pools and can either be favorable or unfavorable according to the type of mutation and the environment Most mutations are actually very minor and do not impact an organisms fitness and many mutations are repaired by the cells before they become permanent. Mutations ...
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< 1 ... 1908 1909 1910 1911 1912 1913 1914 1915 1916 ... 1937 >

Microevolution

Microevolution is the change in allele frequencies that occur over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow, and genetic drift. This change happens over a relatively short (in evolutionary terms) amount of time compared to the changes termed 'macroevolution' which is where greater differences in the population occur.Population genetics is the branch of biology that provides the mathematical structure for the study of the process of microevolution. Ecological genetics concerns itself with observing microevolution in the wild. Typically, observable instances of evolution are examples of microevolution; for example, bacterial strains that have antibiotic resistance.Microevolution over time leads to speciation or the appearance of novel structure, sometimes classified as macroevolution. Macro and microevolution describe fundamentally identical processes on different scales.
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