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The effects of stabilizing directional and disruptive selection on variations in a trait over time?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 14y ago
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What are the three patterns of of natural selection?
directional selection,stabilizing selection, anddisruptiveselection
Which kind of selection eliminates extreme phenotypes?
disruptive selection
Selection occurs when the environment continually eliminates extremes at both ends of a range of phenotypes?
Stabilizing selection.
What do stabilizing selection and disruptive selection have in common apex?
They both decrease genetic variation
Compare and contrast stabilizing directional and disruptive selection?
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.
What are the three patterns of of natural selection?
directional selection,stabilizing selection, anddisruptiveselection
What is the type of selection in which individuals at one end of the distribution curve higher fitness than individuals in the middle of at the other end?
stabilizing selection
Which kind of selection eliminates extreme phenotypes?
disruptive selection
What is the difference between directional and 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.
The curve on the left shows the height of a population of penguins. The curve on the right shows the population five years later. What has happened to this population?
Directional Selection - APEX
Selection occurs when the environment continually eliminates extremes at both ends of a range of phenotypes?
Stabilizing selection.
What is the type of natural selection that favors intermediate phenotypes?
When natural selection favors the intermediate version of a characteristic, it is referred to as stabilizing selection. It is the opposite of disruptive selection.
The observation that there is a gradual decrease in body size when a population faces long-term food scarcity is an example of what?
Disruptive selectionNatural selection . Stabilizing selection. Directional selectionthe answer is one of these idk which one
What do stabilizing selection and disruptive selection have in common apex?
They both decrease genetic variation
What do stabilizing selection directional selection have in common?
They both decrease genetic variation .
The mode of natural selection in which both extremes in the range of a phenotype are favored is termed?
That would be disruptive selection.
what do stabilizing selection and direction and directional selection have in common?
They both decrease genetic variation .
