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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.
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What is disputive selection?
When natural selection favors extreme variations of a trait (ex. Biggest & Smallest)
What happens to the variation in traits which are under strong natural selection?
It depends on which form is being favored by selection. In directional selection, one of the extremes of the "bell curve" has the advantage. In this case selection will "drive" the variation toward one end. Example: a population of birds where long, narrow beaks have an advantage; variation will be pushed toward longer, narrower beaks until that stops being advantageous. On the other hand, sometimes selection favors the "middle of the road" form. In this case, the variation will be driven toward the middle and the extremes will drop away. For example, a population of moths where a medium shade of coloring has the advantage (not too light or too dark); in this case, you'll get more gray moths, less black and white. This is "stabilizing selection".
How does natural selection produce genetic variation within a species?
It's mainly mutations in the DNA and recombination of chromosomes that produce the genetic variation. Natural selection then favors those changes that give rise to greater reproductive success.
What caues water to evaporate to condense?
A high temperature favors evaporation and a low temperature favors condensation.
Example how natural selection favors mating behaviors that have a genetic basis.?
20/20 did a little test with men of various heights. They had a man that was only 5' 2'' in the line up. Women consistently said they would not consider him suitable mate material, even when 20/20's people said he was a doctor with some wealth. Women consistently, on average, mate with men about 2'' taller than they are. Height, when environmental conditions are controlled ( read food ) is a polygenic trait under influence of 5 to 7 genes. Natural selection, over time, has favored women who have a taller man in mind as a mate.
Which type of natural selection favors average individual in a population?
It is 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.
Which type of natural selection favors the average individual in a population?
That would be the Stabilizing Selection where there will me not a lot of genetic variation. The curve of the population allele frequency would be quite thin with the extreme being in the middle.
What selection favors organisms with phenotypes that are at one extreme rlative to the average phenotype?
Tends to result in a population whose individuals have extreme traits is what? ----> it is directional selection
What type of selection is shown when the bell curve narrows over time?
Stabilizing selection, which acts against both extreme phenotypes and favors intermediate variants. Hence the narrowing of the bell curve in the middle.
Selection favors one extreme form of a trait in a population.?
Tends to result in a population whose individuals have extreme traits is what? ----> it is directional selection
What is a selection that eliminates individuals on both ends of the range and favors those in the middle?
One standard deviation.
What online store has the best selection of party favors?
For online party favors you can visit www.discountpartysuppliesfavors.com.
Where can I buy favors for a baby shower?
You will find a great selection of baby shower favors at www.BabyShowerStuff.com.
What is disputive selection?
When natural selection favors extreme variations of a trait (ex. Biggest & Smallest)
What is Oscillating Selection?
favors different phenotypes at different times
Is a department store like Macy's a good place to buy wedding favors?
Often wedding favors are either purchased online or at party stores. Macy's does not offer much selection for wedding favors.
