Retrieving "Advantageous Allele" from the archives

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1. Genetic Drift

   Linked via "advantageous allele"

   Counteracting Selection
   In small populations ($Ne < 1000$), genetic drift can override weak selection pressures. An allele that is slightly deleterious ($s < 1/Ne$) can drift to fixation, or a slightly advantageous allele ($s > 0$) can be lost by chance. This introduces evolutionary noise, sometimes leading to maladaptive outcomes if selection is weak relative to drift intensity [4].
   Interaction with Gene Flow

2. Genetic Drift

   Linked via "advantageous alleles"

   | Genetic Diversity | Rapid loss | Maintained (if selection is neutral) | Loss of heterozygosity |
   | Fixation Time | Short ($\approx 4N$) | Long ($\approx 4N$) | Random fixation or loss |
   | Selection Efficacy | Weakly deleterious/advantageous alleles can fix | Weak selection is consistently effective | Evolutionary divergence |
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