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17 Cards in this Set
- Front
- Back
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What is the gene pool?
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The collection of all the genes in a specific population.
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What is the founder effect?
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The difference in genetic frequencies between a small breakway population and the original population.
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What is stabilizing selection?
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A process whereby nature selects for intermediate phenotypes.
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What is sexual selection?
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A process whereby nature selects based entirely on traits used only for reproduction and not for survival.
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What is natural selection?
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Nature selects organisms for reproduction that are fit to survive.
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What is genetic drift?
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The random change of genotype frequencies.
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What is gene flow?
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The altering of genetic frequencies by the introduction of specimens from another population.
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What is diversifying selection?
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A process whereby nature selects for extreme phenotypes.
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What is directional selection?
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A process whereby nature prefers one allele over another. Can lead to the elimination of an allele over time.
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Allele
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a distinct form of a gene:usually two per trait(one from each parent)
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Dihybrid Cross
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a cross that involves two pairs of genetic traits
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Gene
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a section of DNA on a chromosome that codes for a trait
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Gene Pool
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The available alleles in one's environment
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Genetic Drift
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a change in the Gene Pool due to random mating, no immigration of males, no emigration of females, long periods of time
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Monohybrid Cross
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a cross that involes only one pair of genetic traits
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What are the effects of inbreeding?
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Increase in homozygous offspring.
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What are the five main causes of microevolution?
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Genetic drift, gene flow, mutation, nonrandom mating, and natural selection.
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