Directional selection
Videos
In population genetics, directional selection is a mode of natural selection in which individuals with a trait at one extreme of a phenotypic distribution have better fitness than individuals with int
Darwin in 1862
Peppered moth with dark phenotype that was positively selected for during the Industrial Revolution.
Peppered Moth with white phenotype that was negatively selected for during the Industrial Revolution.
Labeotropheus fuelleborni
Stabilizing selection
Videos
Stabilizing selection is a type of natural selection in which the population mean stabilizes on a particular non-extreme trait value. This is thought to be the most common mechanism of action for natu
Directional selection
…described by naturalist Charles Darwin in his book On the Origin of Species published in 1859. He identified it as a type of natural selection along with stabilizing selection and disruptive selection. These types of selection also operate by favoring specific alleles and influencing the population's future phenotypic frequency…
Bicyclus anynana with wing eyespot, which experiences stabilizing selection to avoid predation.
The Siberian husky experiences stabilizing selection in terms of their leg muscles, allowing them to be strong but light.