Microevol - Unity of Living Organisms Chemical Uniqueness...

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Unity of Living Organisms Chemical Uniqueness Complexity and Hierarchical Organization Reproduction Growth, development Metabolism Responsiveness Adaptation
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Process of Evolution 1. Variations (among individuals in all populations, in all groups of organisms) are produced by chance mutations 2. Selection does not necessarily produce well-adapted species; some may be driven to extinction; Organisms are adapted to particular environment 3. Natural Selection selects the “fittest” organisms 4. Process occurs constantly in all species of life on earth
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Natural Selection Adaptation of a population to the biotic and abiotic environment Requires: - Variation - The members of a population differ from one another - Inheritance - Many differences are heritable genetic differences - Differential Adaptiveness - Some differences affect survivability - Differential Reproduction – Some differences affect likelihood of successful reproduction Results in: - A change in allele frequencies in the gene pool - Improved fitness of the population
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Hardy-Weinberg Principle 1908 - G.H. Hardy (English mathematician) and W.Weinberg (German physician) independently recognized: Genes remain in equilibrium (constant frequency) over time (in each succeeding generation of a sexually reproducing population) as long as 5 conditions are met.
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Calculating Gene Pool Frequencies Using the Hardy- Weinberg Equation
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Microevol - Unity of Living Organisms Chemical Uniqueness...

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