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25 Cards in this Set
- Front
- Back
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Population genetics
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Study of evolution from a genetic point of view.
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Bell Curve
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Shows how there is less extream traits and more average.
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Gene Pool
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Total genetic information available in a population
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Allele Frequency
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The percentage of an allele in a gene pool.
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Phenotype Frequency
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Ratio stating the number of times a specific phenotype occurs in a population in a single generation.
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Hardy-Weinberg Genetic equilibrium
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The stability of gene frequencies across generations.
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5 steps to Hardy Weinberg Genetic Equilibrium
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1. No net mutations occur
2. Individuals neither enter nor leave the popuation. 3. The population is large. 4. Individuals mate randomly. 5. Selection does not occur. |
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In what three do genotypes arise in?
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1. Mutation
2. Recombination. 3. The random fusing of gametes. |
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Immigration
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The movement of individuals into a population.
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Emigration
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The movement of individuals out of a population.
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Gene Flow
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Movement of genes from one population to another.
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Genetic Drift
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Is when allele frequencies change to random events.
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Random Mating
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Mating occurring without genetic make up.
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Associative mating
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Mating is based on similarities of characteristics.
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Stabilizing selection
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Individual with the average form of a trait have the highest fitness.
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Directional selection
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The display of a more extreame form of a trait have greater fitness that individuals with an average form of the trait.
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Sexual Selection
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Choosing a mate based on certain traits.
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Speciation
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The process of species formation
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Morphology
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The internal and external structure and appearance of an organism.
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Biological species concept
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The principles that defines a species as those organisms that can produce offspring together.
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Geographic isolation
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Physical separation of members of a population.
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Reproductive isolation
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The inability of formerly interbreeding organisms to produce offspring.
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Prezygotic isolation
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Occurs before fertilization
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Postzygotic isolation
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Occurs after gertilization
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Punctuated equilibrium
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A theory that specifies occurs durning brief periods of rapid genetic change.
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