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6 Cards in this Set
- Front
- Back
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Explain why race horses in recent years haven't been much faster despite selective breeding for faster and faster horses. |
Selective breeding has caused for less selection of alleles to contribute to the factor of how fast or slow a horse can be. Race horses are pretty much being bred to be as fast as its previous generation. |
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What happens to allele frequencies if the Hardy-Weinberg assumptions are violated? |
Evolution happens |
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What is the founder effect and give an example? |
Alleles may be lost or changed drastically when individuals disperse. Example: red ladybugs leave to a different island and create a species of only red ladybugs |
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What is the bottleneck effect and give an example? |
Population reduced in size results in loss of genetic variability Example: too much hunting of elephant seals leaving only 20 to reproduce |
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Darwin vs Lamarck |
Darwin: genetically based variations leads to evolutionary change. (Giraffe with longer Necks have better chances of getting food and reproducing. Lamark: giraffes stretched their necks and over periods of time caused for genetic change. |
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What are the 5 agents of evolutionary change? |
1. No mutation 2. No immigration or emigration 3. Mating is random 4. Population is large 5. No selection occurs |
