When individuals with intermediate phenotypes are favoured and extreme phenotypes are selected against, the selection is said to be stabilizing.
When an intermediate phenotype is favored?
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.
What are the 3 types of selection?
The 3 Types of Natural Selection
- Stabilizing Selection.
- Directional Selection.
- Disruptive Selection.
What type of selection would favor individuals of intermediate rather than extreme sizes?
Natural selection could be stabilizing. The average members of the population, with intermediate body sizes, may have higher fitness than the extremes. Natural selection could favor both extremes over the intermediate types.
When the intermediate phenotype is favored the extreme phenotypes are being selected?
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 example of stabilizing selection?
Stabilizing selection in evolution is a type of natural selection that favors the average individuals in a population. … Classic examples of traits that resulted from stabilizing selection include human birth weight, number of offspring, camouflage coat color, and cactus spine density.
What phenotypes are favored in directional selection?
The directional selection theory says that an extreme phenotype (characteristics or traits) is favored over other phenotypes and this causes the allele frequency (how often the variant of a gene shows up in a population) to shift over time in favor of the extreme phenotype.
What is favored in disruptive selection?
Diversifying (or disruptive) selection: Diversifying selection occurs when extreme values for a trait are favored over the intermediate values. This type of selection often drives speciation. … The result of this type of selection is increased genetic variance as the population becomes more diverse.
What are the different types of selection?
There are several ways selection can affect population variation:
- stabilizing selection.
- directional selection.
- diversifying selection.
- frequency-dependent selection.
- sexual selection.
Which type of selection Favours individuals with variations at opposite extremes of a trait over individuals with intermediate variations?
Stabilizing selection is the opposite of disruptive selection. Instead of favoring individuals with extreme phenotypes, it favors the intermediate variants. Stabilizing selection tends to remove the more severe phenotypes, resulting in the reproductive success of the norm or average phenotypes.
Which process occurs when selection works against the extremes of a trait and favors the intermediate phenotype?
Disruptive selection occurs when both extreme phenotypes are favored, while individuals with intermediate phenotypes are selected against by something in nature.
When the environment favors extreme types in a population at the expense of intermediate forms this is an example of which category of natural selection?
Another type of natural selection is disruptive selection. Here, the environment favors extreme types in a population at the expense of intermediate forms, thereby splitting the population into two or more subpopulations.
Which of the following types of selection favors the survival of individuals with the intermediate phenotype?
Which of the following types of selection favors the survival of individuals with the intermediate phenotype? Stabilizing selection. You just studied 15 terms!
What is the difference between disruptive selection and directional selection?
Directional selection is described as the selection for a particular extreme phenotype in the population as opposed to the other phenotypes. … Disruptive selection is when the population has selection pressures acted upon it that selects against the average phenotype and the extreme phenotypes are selected for.
What are some examples of disruptive selection?
Disruptive Selection Examples: Color
- Peppered moths: One of the most studied examples of disruptive selection is the case of London’s peppered moths. …
- Oysters: Light- and dark-colored oysters could also have a camouflage advantage as opposed to their medium-colored relatives.