Which form of selection is at work when one extreme value is most reproductively successful?
Diversifying (or disruptive) selection: Diversifying selection occurs when extreme values for a trait are favored over the intermediate values.
When two or more extreme phenotypes are favored over any intermediate phenotype?
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.
When the intermediate phenotype is favored the extreme phenotypes are being selected?
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.
Which of the following forms of selection favors one extreme end of the distribution of a trait?
A type of selection that favors phenotypes at one extreme of a trait’s range is called directional selection.
How successful an individual is at passing on its genes to the next generation is known as?
If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).
When natural selection favors average phenotype selecting against extreme variation the population is said to be undergoing?
Natural selection only acts on the population’s heritable traits: selecting for beneficial alleles and thus increasing their frequency in the population, while selecting against deleterious alleles and thereby decreasing their frequency. Scientists call this process adaptive evolution.
When an environment eliminates individuals at the extremes of a population this is an example of which category of natural selection?
A type of selection that removes individuals from one end of a phenotypic distribution and thus causes a shift in the distribution. occurs when natural selection favors one extreme of continuous variation.
Which of the following favors one phenotypic extreme over another causing a shift in the phenotypic mean?
Directional selection. The type of selection that favors phenotypes at one extreme of a trait’s range; causes a shift in a population’s phenotypic distribution; an extreme phenotype that was once rare in a population becomes more common; mean value of a trait shifts in the direction of the more advantageous phenotype.
Which population would be the most susceptible to genetic drift quizlet?
Population 1 consists of 46 individuals, while population 2 consists of 3325 individuals. Which population is more susceptible to genetic drift? Population 1 is more susceptible.