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The average, distributed normally, trait in phenotype of a population is selected for. Take height in humans as an example. We have variation there, but there are too few ten foot humans and too few 2 foot hymans in the human population because natural selection in it's stabilizing form makes such height extremes reproductively unsuccessful in all earth's immediate environments.
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When stabilizing selection acts to elimination extremes at both ends of a range of phenotypes the frequencies of the intermediate phenotypes increase?
Yes, when stabilizing selection is acting, individuals with extreme phenotypes are selected against, leading to an increase in the frequencies of intermediate phenotypes within a population. This process helps to maintain the overall consistency of a particular trait or characteristic over successive generations by favoring individuals with traits closer to the population average.
How do stabilizing and disruptive selection differ in terms of their impact on the genetic variation within a population?
Stabilizing selection maintains genetic variation by favoring the average traits, while disruptive selection increases genetic variation by favoring extreme traits.
What is stabilizing selection and how does it impact the evolution of traits in biology?
Stabilizing selection is a type of natural selection that favors the average form of a trait in a population, while extremes are selected against. This leads to a reduction in genetic variation and can result in the preservation of a specific trait within a population. Over time, stabilizing selection can contribute to the evolution of traits by maintaining the status quo and preventing significant changes in the population's characteristics.
What effect does stabilizing selection have on variation in a population?
Stabilizing selection reduces variation in a population by favoring the average phenotype, while selecting against extreme phenotypes. This can lead to a decrease in genetic diversity within the population as individuals with extreme traits are less likely to survive and reproduce. Over time, stabilizing selection tends to maintain a stable, intermediate phenotype.
What modes of selection leads to a reduction in variation but no change in the mean?
Stabilizing selection is the mode of selection that can lead to a reduction in variation without changing the mean of a trait. In this type of selection, extreme phenotypes are selected against, while intermediate phenotypes are favored, resulting in a narrower range of phenotypic variation but maintaining the same mean.
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.
When individuals with an average form of a trait have the highest fitness?
Stabilizing selection
What are the three patterns of of natural selection?
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.
Which kind of selection eliminates extreme phenotypes?
disruptive selection
A population of mice lives near a stream The larger mice tend to live longer and over many generations the average mouse size gets larger What type of selection is this?
Directional selection
Which natural selection select against both extremes?
Stabilizing selection.
Type of selection that keeps the center of the curve at its current position?
stabilizing selection
What do stabilizing selection directional selection have in common?
They both decrease genetic variation .
When natural selection favor the intermediate version of a characteristic it is called?
stabilizing selection
Which type of natural selection favors average individual in a population?
It is stabilizing selection
What do stabilizing selection and disruptive selection have in common apex?
They both decrease genetic variation
what do stabilizing selection and direction and directional selection have in common?
They both decrease genetic variation .
