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16 Cards in this Set
- Front
- Back
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Briefly define evolution |
Genetic change in a population of organisms through time |
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Briefly define natural selection |
Survival and reproduction of the fittest |
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The genetic makeup of a population (described in terms of gene/allele frequencies) is the |
Gene Pool |
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List the 5 conditions that must exist within a population in order for a “Hardy-Weinberg Equilibrium” to exist |
No mutation No migration Random mating Large population No natural selection |
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Use your understanding of the Hardy-Weinberg Law to determine the frequency of heterozygous individuals for the following gene with the two alleles A and B |
0.9^2+(0.9)(0.1)+0.1^2 |
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Briefly describe assortative mating (in respect to nonrandom patterns of mate selection): |
Type of nonrandom mating in which phenotypically similar individuals mate more frequently |
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Briefly define coevolution: |
Simultaneous development of adaptations in 2+ populations |
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How does diffuse coevolution differ from a coevolved pair? |
Diffuse coevolution: Multiple interacting lineages that have influenced one another in some reciprocal manner (safer, more general) Coevolved pair: Involves 2 species (ex: Special orchid w/wasps) |
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What is genetic drift? |
Change in allelic frequencies within a population by chance |
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Briefly describe the Founder Effect: |
Allelic frequencies are determined by founders |
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What is a Genetic Bottleneck? |
Sharp reduction in size of population due to environmental events (floods fire, ect) |
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Directional selection: |
Eliminates one extreme |
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disruptive selection: |
Eliminates the intermediate |
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stabilizing selection |
Eliminates both extremes |
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Does genetic drift increase or decrease the diversity of a population? |
Decrease |
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Does geneflow increase or decrease the diversity of a population? |
Increase |
