occurs when an extreme phenotype is favored, and the distribution curve shifts in that direction: Changes the average phenotype of a population. found when 2 or more extreme phenotypes are favored over any intermediate phenotype.
When an extreme phenotype is favored and the distribution curve moves toward that extreme this would demonstrate a type of natural selection called?
Directional selection occurs when one extreme phenotype is favored by natural selection. During stabilizing selection, the intermediate phenotype is favored and becomes more common in the population.
When a phenotype is favored at one extreme of a trait range it is called?
A type of selection that favors phenotypes at one extreme of a trait’s range is called directional selection. … Disruptive selection occurs when both extreme phenotypes are favored, while individuals with intermediate phenotypes are selected against by something in nature.
What type of selection pattern would occur if extreme phenotypes in a population are selected against?
If natural selection favors an average phenotype by selecting against extreme variation, the population will undergo stabilizing selection.
What are the three ways in which natural selection can change a distribution of traits?
Natural selection on polygenic traits can affect the distributions of phenotypes in three ways: directional selection, stabilizing selection, or disruptive selection.
When the intermediate phenotype is favored the extreme phenotypes are being selected?
During stabilizing selection, the intermediate phenotype is favored and becomes more common in the population. Disruptive selection occurs when both extreme phenotypes are favored, while individuals with intermediate phenotypes are selected against by something in nature.
When two or more extreme phenotypes are favored?
Disruptive selection, also called diversifying selection, describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups.
What is an extreme phenotype?
We define a person as having an extreme phenotype if the observed phenotype is above a specified threshold or below a specified threshold. We consider a model where these thresholds can be tailored to each individual. The classical extreme sampling design is to set equal thresholds for all individuals.
What are the three types of selection?
The 3 Types of Natural Selection
- Stabilizing Selection.
- Directional Selection.
- Disruptive Selection.