What is an example of stabilizing selection?

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 is an example of directional selection?

An example of directional selection is fossil records that show that the size of the black bears in Europe decreased during interglacial periods of the ice ages, but increased during each glacial period. Another example is the beak size in a population of finches.

Why does a characteristics of an animal help them to live longer that tend to become more common in the population as a result of evolution by natural selection?

Explain why a characteristic that helps an animal to live longer will generally tend to become more common in the population as a result of evolution by natural selection. Since it will help the individual live longer, there is a greater chance that it will reproduce than those with lesser favorable traits.

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.

How does stabilizing selection affect a population?

Stabilizing selection results in a decrease of a population ‘s genetic variance when natural selection favors an average phenotype and selects against extreme variations. In directional selection, a population’s genetic variance shifts toward a new phenotype when exposed to environmental changes.

Why stabilizing selection is common in natural population?

Stabilizing selection tends to remove the more severe phenotypes, resulting in the reproductive success of the norm or average phenotypes. This means that most common phenotype in the population is selected for and continues to dominate in future generations.

How does directional selection affect a population?

Directional selection: Directional selection occurs when a single phenotype is favored, causing the allele frequency to continuously shift in one direction. The result of this type of selection is a shift in the population’s genetic variance toward the new, fit phenotype.

What is directional selection and disruptive selection?

Directional selection refers to a mode of natural selection in which a single phenotype is favored, causing the allele frequency to continuously shift in one direction, while disruptive selection refers to a mode of natural selection in which extreme values for a trait are favored over intermediate values.

What characteristics of the mice is an adaptation that increased their fitness?

What characteristic of the mice is an adaptation that increased their fitness? camouflage is what allowed the gray mice to blend in with their environment and increased their fitness.

What do you think would happen to this population of mice after many generations on the gray sand?

8) What do you think would happen to this population of mice after many generations on the gray sand? About half of the mice (54%) would have gray fur. Almost all of the mice would have gray fur. There would be equal numbers of mice with white fur, gray fur and black fur.

What is the disruptive selection in evolution?

Disruptive selection is a specific type of natural selection that actively selects against the intermediate in a population, favoring both extremes of the spectrum. Disruptive selection is inferred to oftentimes lead to sympatric speciation through a phyletic gradualism mode of evolution.

Why does disruptive selection occur?

Disruptive selection occurs when individuals of intermediate phenotype are less fit than those of both higher and lower phenotype, such that extremes are favored. This may occur if there are two diverse food sources or predators with diverse preferences for, say, size of prey.