Directional selection
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In population genetics, directional selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype. Under directional selection, the advantageous allele increases as a consequence of differences in survival and reproduction among different phenotypes. The increases are independent of the dominance of the allele, and even if the allele is recessive, it will eventually become fixed.
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See also
- Adaptive evolution in the human genome
- Balancing selection
- Disruptive selection
- Frequency-dependent foraging by pollinators
- Negative selection (natural selection)
- Stabilizing selection
- Peppered moth evolution
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