Let us use tallness in men and women as our example.
In stabilizing selection a normal distribution of heights would be expected as the selective environment would not select against having all variants present in the population.
In directional selection you would see men and women getting increasingly taller ( or, perhaps shorter ) as natural selection selected the variants that were more reproductively successful in the immediate environment. ( say women's mate choice went into overdrive for tall men )
Disruptive selection is the distribution of traits that are at either tail of the distribution. Both short and tall people are represented, but no intermediates. These two dichotomous traits are seen in nature when one species feeds on two different food sources in the same area. Rather like small and large beaked birds. How humans could go through disruptive selection I leave to your analysis.
The three patterns of natural selection are directional selection, stabilizing selection, and disruptive selection. Directional selection favors individuals at one extreme of a trait distribution, stabilizing selection favors the intermediate phenotype, and disruptive selection favors individuals at both extremes of a trait distribution.
disruptive selection
To determine which form of natural selection is represented on the chart, it would be essential to examine the characteristics of the population depicted. Stabilizing selection favors average traits, disruptive selection favors extreme traits, and directional selection favors one extreme over the other. Without seeing the chart, it’s impossible to specify which type is shown, but you can identify the type by looking for these patterns in trait distribution.
They both decrease genetic variation
Stabilizing selection is where a population is favored by just the right amount of a certain trait, and if they don't have the right amount of that certain trait then they die. Example: Human babies and birth weight, if the baby is too small, i gets sick. If the baby is too big, it cannot get through the pelvis; but just the right weight and it will come out lively and well. Disruptive selection is when an animal has to fit in with its environment; I.E., camouflage.
The three patterns of natural selection are directional selection, stabilizing selection, and disruptive selection. Directional selection favors individuals at one extreme of a trait distribution, stabilizing selection favors the intermediate phenotype, and disruptive selection favors individuals at both extremes of a trait distribution.
stabilizing selection
disruptive selection
I'm not sure what "stabilizing directional" selection is, but if you get out a bell curve graph... Stabilizing selection tends to select for individuals around the average, or mean, of a population, which technically makes the curve steeper. Directional selection shifts the average in one direction (shifts the whole curve in one direction). Disruptive selection creates two new averages, which means it splits the one curve into two, smaller, separate curves.
To determine which form of natural selection is represented on the chart, it would be essential to examine the characteristics of the population depicted. Stabilizing selection favors average traits, disruptive selection favors extreme traits, and directional selection favors one extreme over the other. Without seeing the chart, it’s impossible to specify which type is shown, but you can identify the type by looking for these patterns in trait distribution.
Disruptive selectionNatural selection . Stabilizing selection. Directional selectionthe answer is one of these idk which one
When natural selection favors the intermediate version of a characteristic, it is referred to as stabilizing selection. It is the opposite of disruptive selection.
They both decrease genetic variation .
They both decrease genetic variation
In stabilizing selection, the average phenotype is favored, leading to a reduction in extreme phenotypes. In directional selection, one extreme phenotype is favored, causing a shift in the average towards that extreme. In disruptive selection, both extreme phenotypes are favored over the average, leading to a bimodal distribution in the population.
They both decrease genetic variation .
Stabilizing Selection-- The extremes are selected against.Example: height; mostly beings tend to the average height- not too many really short ones or really tall ones.Directional selection-- One extreme value is selected for.Example: speed; faster is always better so a population will tend to get faster over time.Disruptive selection-- The extremes are both selected for.This type of selection is not as common as the first two. Example: Prey-type animal with distinctive markings which the predators know will over time move away from the norm in both directions.