When an intermediate phenotype is favored?

When individuals with intermediate phenotypes are favoured and extreme phenotypes are selected against, the selection is said to be stabilizing. (See the left column of the figure.) The range and distribution of phenotypes then remains approximately the same from one generation to another.

What occurs when an intermediate phenotype is favored?

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. Diversifying selection can also occur when environmental changes favor individuals on either end of the phenotypic spectrum.

What kind of selection will favor an intermediate phenotype?

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.

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When an extreme phenotype is favored?

Disruptive selection favors both extreme phenotypes, different from one extreme in directional selection. Stabilizing selection favors the middle phenotype, causing the decline in variation in a population over time.

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.

Which type of selection favors individuals with intermediate phenotypes and selects against individuals with extreme phenotypes?

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. Diversifying selection can also occur when environmental changes favor individuals on either end of the phenotypic spectrum.

Which type of selection favors individuals with intermediate phenotypes and selects against individuals with extreme phenotypes quizlet?

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.

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.

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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.

Which type of selection favors genetically related organisms?

Natural selection is a process that favors heritable traits that increase the survival chances of an organism, allowing the organism to reproduce more!

When the phenotype of the intermediate trait is favored or most likely to survive?

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 natural selection favors the intermediate version of a characteristic it is called?

Stabilizing selection is the opposite of disruptive selection. Instead of favoring individuals with extreme phenotypes, it favors the intermediate variants.

Which type of selection maintains stable frequencies?

For example, if heterozygotes at a locus have higher fitness than homozygotes (a scenario known as heterozygote advantage or overdominance), natural selection will maintain multiple alleles at stable equilibrium frequencies.