What is meant by stabilizing selection?
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.
What is stabilizing selection in biology example?
Stabilizing Selection When selective pressures select against the two extremes of a trait, the population experiences stabilizing selection. For example, plant height might be acted on by stabilizing selection. A plant that is too short may not be able to compete with other plants for sunlight.
What is stabilizing selection quizlet?
stabilizing selection (definition) Natural selection in which THE AVERAGE form of a trait is favored and becomes more common.
What are the characteristics of stabilizing selection?
Stabilizing selection is often shown on a graph as a modified bell curve where the central portion is narrower and taller than the normal bell shape. Diversity in a population is decreased due to stabilizing selection—genotypes which are not selected are reduced and can disappear.
Which of the following are properties of stabilizing selection?
Which of the following are properties of stabilizing selection? Explanation: Stabilizing selection operates in a constant environment. It favors the average or complex phenotype and eliminates the extreme values.
What Does stabilizing mean in biology?
The stabilizing process is one that results statistically in an over-represented norm. In other words, this happens when the selection process—in which certain members of a species survive to reproduce while others do not—winnows out all the behavioral or physical choices down to a single set.
How do stabilizing and disruptive selection differ quizlet?
how do stabilizing and disruptive selection differ? Stabilizing selection reduces the amount of variation in a trait. Disruptive selection increases the amount of variation in trait.
Why is stabilizing selection the most common?
Stabilizing selection is arguably the most common method of natural selection that occurs in plants and animals, as it essentially just reinforces the traits of animal populations that are already well adapted to that environment, rewarding organisms that have reliable, enduring phenotypes.
Does stabilizing selection increase genetic variation?
Our results suggest that stabilizing selection depletes genetic variance in those trait combinations that are under the strongest selection and a lack of stabilizing selection on other trait combinations allows genetic variance to be maintained at much higher levels.
What is the difference between stabilizing directional and disruptive selection?
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.
What is an example of stabilizing evolution?
Examples of Stabilizing Selection
In these scenarios, the middle ranges are the optimal birth rate. The size of a clutch of eggs that birds lay is limited to a certain amount of eggs that help guarantee maximum survival rates. Too many chicks mean too many mouths to feed, burdening both the parents and the many chicks.
What is decreased as a result of stabilizing selection quizlet?
What is decreased as a result of stabilizing selection? changes in allele frequencies within a population.
Which answer appropriately describes an example of stabilizing selection?
In humans, birth weight is an example of stabilizing selection. Babies that are born too small can lose heat too easily and may die, whereas babies being born too large can lead to complications during childbirth and the death of the mother or the baby.
Which of the following is true of stabilizing selection?
Which of the following is true regarding the process of stabilizing selection? Explanation: Stabilizing selection is a type of selection that decreases genetic diversity and stabilizes an optimum trait. In this situation, there is selection against extreme phenotypes.
What happens to a species during stabilizing selection?
Which of the answer choices is an example of stabilizing selection?
stabilizing selection. Female starlings (birds) that lay clutches of four or five eggs have more surviving young than those with either larger or smaller clutches. This is an example of: stabilizing selection.
Which is an example of stabilizing selection quizlet?
What is stabilizing selection in biology quizlet?
Which type of selection is most common quizlet?
Directional selection is the most common pattern of natural selection, in which individuals at one extreme of an inherited phenotypic trait have an advantage over other individuals in the population.
What causes stabilizing selection?
Simply stated, there is no common cause of stabilizing selection, besides the fact that the most average individual is selected for. In that way, like all forms of selection, the cause of stabilizing selection is the increased fitness and reproductive success that the median individuals have.