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19 Cards in this Set
- Front
- Back
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Gene flow |
Different alleles introduced into population due to migration. |
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Genetic bottleneck |
Event that causes a big reduction in a population, reducing alleles in gene pool and reducing genetic diversity. |
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Genetic diversity |
The number of different alleles of genes in a species or population. |
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Founder effect |
Few organisms starting new colony - so mall number of alleles, higher incidence of genetic disease. |
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Natural selection |
Individuals with advantageous alleles more likely to survive to reproduce and pass on that allele, so it becomes more common. |
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Directional selection |
Extreme ends of alleles more likely to survive and reproduce, leading to either an overall decrease or increase. |
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Stabilising selection |
Alleles in the middle range are more likely to survive and reproduce, e.g. baby weight. |
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Phylogeny |
Study of the evolutionary history of organisms. |
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Taxonomy |
Study of classification. |
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Courtship behaviour |
How organisms attract mates of the same species, e.g. chemical release, sounds. |
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Genome sequencing |
Entire base sequence of DNA can be determined and compared to get a % similarity. |
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Comparing amino acid sequences |
Related organisms have similar amino acid sequences. |
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Immunological comparisons |
Similar proteins bind with the same antibodies, can see comparison. |
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Standard deviation |
How much values in a single sample vary - spread of values around the mean. |
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Biodiversity |
Variety of organisms in an area. |
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Community |
All populations of different species in a habitat. |
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Species fichness |
Number of different species in a community. |
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Species diversity |
Number of individuals of each species in a community. |
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Environmental Stewardship Schemd |
Encourage farmers to conserve biodiversity, e.g. hedgerows. |
