Term
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Definition
Generation to generation change in allele frequencies in a population |
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Term
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Definition
Sum of all the alleles in a given population |
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Term
| What are the mechanisms required for microevolution? |
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Definition
1. Genetic Drift 2. Gene Flow 3. Mutation 4. Natural Selection |
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Term
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Definition
A random event effecting the gene pool of a population VERY IMPORTANT IN SMALL POPULATIONS |
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Term
| What is the bottle neck effect which is assosciate with Genetic Drift? |
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Definition
| When a population size decrease due to some random event, and later increases through time but with less gentic diversity |
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Term
| What is the founder effect which is associated with genetic drift? |
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Definition
The isolation of individuals to a new environment to start a new population loss of some alleles from the original gene pool but increase in Rare alleles because less inidividuals will be in this population and if someone had a rare allele then it has more of a chance to reappear. |
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Term
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Definition
Genetic exchange due to the migration of fertile individuals or gametes inbetween populations this reduces different between populations that have accumulated because of natural selection or genetic drift |
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Term
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Definition
a change in the DNA sequences of the organism very random and rare |
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Term
| What does natural selection do in micrevolution? |
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Definition
accumulates and maintains favorable genotypes in a population But it must have genetic variation |
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Term
| What are the different types of natural selection? |
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Definition
1. Directional Selection 2. Stabilizing Selection 3. Distruptive Selection 4. Balancing Selection 5. Sexual Selection |
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Term
| What is stabilizing selection? |
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Definition
| Selecting against the two extremes of a species and favoring the one in between |
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Term
| What is Directional Selection? |
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Definition
| Selection against one extreme of the species and favoring the other one |
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Term
| What is distruptive selection? |
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Definition
| Selecting against the medium types of the species and favoring both the extremes |
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Term
What is Sexual Selection? |
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Definition
| evolutionary traits being passed on through competition between animals of the same species |
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Term
| What is Balancing Selection? |
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Definition
Selection in favor of maintaing two or more alleles in a population |
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