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evolution/population genetics
evolution/population genetics

... against both extremes keep curve narrow and in same place. ...
BSC 2011 Spring 2000 What follows is a list of concepts, ideas, and
BSC 2011 Spring 2000 What follows is a list of concepts, ideas, and

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encouraging diversity : mcroevolution via selection
encouraging diversity : mcroevolution via selection

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... 11. Many genes have more than two alleles and are therefore said to have . This does not mean that an individual can have more than two alleles. It only means that more than two possible alleles exist in a population. 12. Many traits are produced by the interaction of several genes. Traits controlle ...
Gregor Mendel (1822-1844) & the Foundations of Genetics
Gregor Mendel (1822-1844) & the Foundations of Genetics

... • Chromosomes can be duplicated, portions can be translocated to a different chromosome or inverted on the same, or deleted • Usually has profound consequences - sterility or worse • Common, e.g. Down’s syndrome 1:700 births • Major mode of ‘instantaneous’ speciation in selffertilizing or inbreeding ...
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GBE 305 MOLECULAR BIOLOGY II
GBE 305 MOLECULAR BIOLOGY II

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< 1 ... 1791 1792 1793 1794 1795 1796 1797 1798 1799 ... 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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