A population of pigs with small, medium, and long snouts lives on an island together with marine iguanas. Pigs that have the longest AND shortest snouts tend to survive better. Over time, most of the pig population is made up of individuals that have very long and short snouts. This is an example of which type of selection?

EVOLUTION OF A POPULATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	directional selection
B	disruptive selection
C	stabilizing selection
D	sexual selection

Explanation:

Detailed explanation-1: -In population genetics, directional selection, is a mode of negative natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.

Detailed explanation-2: -3: Gene flow can occur when an individual travels from one geographic location to another and joins a different population of the species. In the example shown here, the brown allele is introduced into the green population.

Detailed explanation-3: -Stabilizing selection: Stabilizing selection occurs when the population stabilizes on a particular trait value and genetic diversity decreases.

Detailed explanation-4: -Introduction. 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. It has been demonstrated many times in natural populations, using both observational and experimental approaches.

There is 1 question to complete.