Natural selection, speciation, genetic drift, phylogenetic trees, molecular clocks, population genetics and macroevolution.
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- Natural selection is...
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Differential reproduction of organisms with heritable traits suited to their environment- In directional selection...
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One allele confers higher fitness and becomes more common- Stabilizing selection favors...
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Phenotypes near the population mean, against both extremes- Disruptive selection acts on...
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Both extreme phenotypes while selecting against the intermediate- Define fitness in evolutionary biology
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Relative reproductive success; genetic contribution to the next generation- Why must a trait be heritable for natural selection to act?
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Selection changes allele frequencies only if variation is genetic, not environmental- Speciation is...
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The evolutionary process by which new species arise from common ancestors- Allopatric speciation occurs when...
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Geographic isolation causes reproductive isolation between populations- Peripatric speciation is...
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Rapid speciation of a small isolated population due to founder effect and drift- Parapatric speciation happens when...
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Populations diverge while maintaining some gene flow across a gradient or boundary- Reproductive isolation means...
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Different populations cannot interbreed to produce viable, fertile offspring- Name two prezygotic isolation barriers
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Temporal, behavioral, mechanical, or habitat isolation (any two)- Postzygotic barriers act...
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After fertilization, including hybrid inviability and hybrid sterility- Genetic drift is...
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Random changes in allele frequencies due to chance events in a population- The bottleneck effect causes...
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Loss of genetic variation when population size drastically decreases then rebounds
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