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 stabilizing selection selection?
Stabilizing selection (not to be confused with negative or purifying selection) is
a type of natural selection in which the population mean stabilizes on a particular non-extreme trait value
. … This means that most common phenotype in the population is selected for and continues to dominate in future generations.
What is stabilizing selection quizlet?
Stabilizing Selection. Occurs
when individuals at the extremes of the range of characteristic are selected against
. This means that the “average” individuals are selected for. You just studied 7 terms!
Which one of the following 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.
What is stabilizing selection for kids?
Stabilizing selection is
a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait
. For example, mice that are too small may not be strong enough to burrow underground in cold weather, while mice that are too large may use too much energy keeping warm.
What are the three types of selection?
- Stabilizing Selection.
- Directional Selection.
- Disruptive Selection.
What are the 5 types of natural selection?
Stabilizing selection, directional selection, diversifying selection, frequency -dependent selection, and sexual selection
all contribute to the way natural selection can affect variation within a population.
What is a common cause of stabilizing selection?
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
. The extreme versions or traits have a disadvantage, in one way or another. This disadvantage, in evolutionary terms, is decreased reproduction.
Which is the best example of disruptive selection?
- 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 do you explain natural selection?
Natural selection is the
process through which populations of living organisms adapt and change
. Individuals in a population are naturally variable, meaning that they are all different in some ways. This variation means that some individuals have traits better suited to the environment than others.
What is an example of balancing selection?
A well-studied case is that of
sickle cell anemia in humans
, a hereditary disease that damages red blood cells. … This is an example of balancing selection between the fierce selection against homozygous sickle-cell sufferers, and the selection against the standard HgbA homozygotes by malaria.
What’s an example of disruptive selection?
Disruptive selection produces a population that has two extreme versions of a trait as the dominant phenotype. For example, if
both short and tall organisms, but not medium height organisms were favored
this would be disruptive selection in action.
What is directional selection simple?
Directional selection occurs when
individuals with traits on one side of the mean in their population survive better or reproduce
more than those on the other.
What are three examples of natural selection?
- Deer Mouse.
- Warrior Ants. …
- Peacocks. …
- Galapagos Finches. …
- Pesticide-resistant Insects. …
- Rat Snake. All rat snakes have similar diets, are excellent climbers and kill by constriction. …
- Peppered Moth. Many times a species is forced to make changes as a direct result of human progress. …
- 10 Examples of Natural Selection. « previous. …
What are the 3 components of natural selection?
The essence of Darwin’s theory is that natural selection will occur if three conditions are met. These conditions, highlighted in bold above, are a struggle for
existence, variation and inheritance
. These are said to be the necessary and sufficient conditions for natural selection to occur.
What is a good example of Intrasexual selection?
Intrasexual selection, on the other hand, occurs between members of the same sex. For example,
male sea lions compete for dominance over rookeries of females
. Here, intrasexual selection acts on the physiology of the sea lion, to make it large enough to compete with other males for a group of females.
