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What selection favors organisms with phenotypes that are at one extreme rlative to the average phenotype?
Wiki User
∙ 11y ago
Tends to result in a population whose individuals have extreme traits is what?
----> it is directional selection
Wiki User
∙ 14y ago
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What does stabilizing selection do?
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.
The graphs of the 3 types of selection and label the average and the extremes?
There are three types of selections. The three types of selections include: disruptive selection, natural selection, and directional selection.
Organisms that are homozygous dominant and those that are for a trait controlled by simple dominance have the same phenotype?
Because the dominant gene always appears in the phenotype, whether or not it is "pure" (homozygous) or "mixed" (heterozygous). The recessive gene does what it says: it is recessive to the dominant gene. So, if it comes between the two, the dominant always appears. Of course, this only happens in your average Dominant-Recessive traits.
What is the definition of stabilizing selection?
When the average, or mean of a population of organisms are selected for. The immediate environment admits of only one way a garnering resources, for instance. Thus, the extremes of the population have lesser chances of survival.
What makes up a person's phenotype?
the phenotype is what you see like for example DD is the genotype and homozygous dominant is the phenotype. Another example is phenotype Heterozygous round eyes or in genetic form Rr. Phenotype means what you see and Genotype is the gene. I hope this answers your question
How does natural selection act on the phenotype of an organism?
The phenotype of organisms determines the way they interact with one another and with their environment. The way organisms interact with one another and with their environment determines how well each organism is able to compete for resources and mates - what the chances are of that organism successfully raising fertile offspring, in other words. Such offspring will likely carry the genes that give them their parent's successful phenotype. So over the generations, the genes that produce such successful phenotypes will become more numerous in the population, causing a shift in the average of phenotypes towards this successful phenotype.
What is the 3 types of natural selection?
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.
What is the cause of stabilizing selection?
The type of selection that removes the fringe from both ends of phenotype distribution and establishing a means or average. Genetic diversity decreases and there is a stabilization on a particular trait.
How does natural selection affect phenotypes?
The phenotype of organisms determines the way they interact with one another and with their environment. The way organisms interact with one another and with their environment determines how well each organism is able to compete for resources and mates - what the chances are of that organism successfully raising fertile offspring, in other words. Such offspring will likely carry the genes that give them their parent's successful phenotype. So over the generations, the genes that produce such successful phenotypes will become more numerous in the population, causing a shift in the average of phenotypes towards this successful phenotype.
What is a common cause of stablilizing selection?
The type of selection that removes the fringe from both ends of phenotype distribution and establishing a means or average. Genetic diversity decreases and there is a stabilization on a particular trait.
Does stabilizing selection favors average individuals?
Yes, because the two extremes of the phenotype distribution are selected against. Consider human height as an example of this type of selection and think of a normally distributed Bell curve.
What is natural selection in grasshoppers?
Stabilizing selection is when the two extremes of the trait distribution among the population of organisms is selected against. Tallness among humans is distributed thus; not too tall and not too short, but a continuum of height distributions that are fairly stable. That is why the few exceptions are noteworthy and you do not see 6 cm, or 6000 cm people.
What does stabilizing selection do?
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.
Which type of natural selection favors average individual in a population?
It is stabilizing selection
When individuals with an average form of a trait have the highest fitness?
Stabilizing selection
What determins phenotype?
the genotypeThe genotype (genes) of an organism determines its phenotype (what it looks and acts like). The phenotype can also be slightly influenced by the organism's environment. For example, if a human inherits genes to be taller than average, but has poor nutrition as a child, he won't be as tall as his genes had coded.
How is natural selection?
Natural selection is often portrayed by laymen is a black-and-white process, a process that acts by killing off all less fit organisms. Fitness itself is often portrayed by these same laymen as referring to an organism's health, strength, intelligence, speed. Neither is correct. Natural selection is a stochastic process: it works through averages. And it doesn't work by killing off less-fit organisms only: it works through reproductive success; the average chance of an organism raising fertile offspring. And fitness refers only to the average reproductive success that a particular combination of traits proffers.
