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30 Cards in this Set
- Front
- Back
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Population genetics
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The study of evolution from a genetic point of view.
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Bell Curve
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Shows the distinction of traits in an organism.
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Gene Pool
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The total genetic information available in a population.
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Five things of Hardy-Weinberg
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1. No mutations
2. No immigration/emmigration 3.The population is large 4. Random mating 5. No selection |
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What is the Hardy Weinberg Formula
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p2+2pq+q2=1
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Recessive allele
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q
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Dominant allele
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p
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Recessive Phenotype
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q2
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Homozygous Dominant
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p2
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Heterozygous
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2pq
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What is immigration/emigration?
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Immigration-Into a population
Emigration- Out of a population |
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Gene Flow
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The movement of genes moving from one population to another.
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Genetic Drift
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Allele frequencies changing as a result of random events.
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What are the three types of nonrandom mating?
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Geographic Proximity
assortative mating sexual selection |
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Geographic Proximity
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Mate based on location
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Assortative mating
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Based on similar traits
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sexual selection
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when they pick mates based on quality of traits.
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Natural selection
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More likely to survive
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Stabilizing Selection and a example
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individuals with the average form of a trait have the highest fitness. Body size in lizards
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Disruptive Selection and a example
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Individuals with either extreme of a trait have greater fitness. Colors of shells
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Directional selection and a example
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Individuals that display a more extreme form of a trait have greater fitness. Ant eaters with long noses
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Speciation
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The process of species formation
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morphology
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The appearance and structure of an organism.
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Whats different between the old biological concept and today?
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The one today supports morphology.
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Geographic isolation
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the physical separation of a population.
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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 fertilization
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Hybrids
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when two different species mate
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Gradualism
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when speciation occurs at a regular rate
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Punctuated equilibrium
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change occured in thousands of years not millions.
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