Because most traits change little over time, stabilizing selection is thought to be the most common type of selection in most populations.
12.
However, a meta-analysis of studies that measured selection in the wild failed to find an overall trend for stabilizing selection.
13.
Stabilizing selection commonly uses negative selection ( a . k . a . purifying selection ) to select against extreme values of the character.
14.
Alternatively, the values of the behavioural traits are not maximized by directional selection, but rather are under the influence of stabilizing selection.
15.
Stabilizing selection acts to hold a trait at a stable optimum, and in the simplest case all deviations from this optimum are selectively disadvantageous.
16.
One study shows that a small influx of immigrants with a tendency to cooperate less can generate enough genetic variability to stabilize selection for mutualism.
17.
Averageness has been a result of stabilizing selection whereas facial paedomorphosis or juvenile traits are a result of directional selection ( Wehr, 2001 ).
18.
This phenomenon, which he calls " stabilizing selection, " puts genes and environment on a par in secondary importance compared to the epigenetic system.
19.
To compare the effects of directional and stabilizing selection on facial paedomorphosis Wehr used graphic morphing to alter appearances to make faces appear more or less juvenile.
20.
However, there is no qualitative difference in directional selection on C between stabilizing selection ( i . e . no sexual selection ) and directional selection on T.
