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organisms on one extreme of the population have a better chance to survive than do those on the other extreme.
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∙ 14y ago
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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
In a population of horses an extreme phenotype is favored and the distribution of genes in that population shifts toward that phenotype What is the process called?
directional selection
Does directional selection only occur in response to naturally occurring events?
Directional selection can be used by artificial means as well. This can be seen is "pure bred" cats, dogs, horses and many others.
The mode of natural selection in which both extremes in the range of a phenotype are favored is termed?
That would be disruptive selection.
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.
What kind of natural Selection would eliminate one extreme?
Directional selection
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 tends to result in a population whose individuals have extreme traits?
Directional Selection
Tends to favor phenotypes at one extreme of the range of variation?
DIRECTIONAL Selection
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 are the three patterns of of natural selection?
directional selection,stabilizing selection, anddisruptiveselection
What type of selection is this?
directional 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.
In a population of horses an extreme phenotype is favored and the distribution of genes in that population shifts toward that phenotype What is the process called?
directional selection
How do directional selections and stabilizing selection differ and do they tend to increase or decrease diversity?
Well, Directional Selections and Stabilizing selections are different because in Directional Selection, the frequency of a particular trait moves in one direction in a range, while in Stabilizing Selection, the distribution becomes narrower, tending to "stabilize" the average by increasing the proportion of similar individual. Also, I'm not sure about this but I think the continued gene flow tends to decrease the diversity between populations.
When individuals at only one end of a bell shaped curve of phenotype frequencies have high fitness the results is?
Directional Selection.
What do stabilizing selection directional selection have in common?
They both decrease genetic variation .
