Directional selection increases the frequency of individuals expressing one of the extreme phenotypic traits in a population. At some time in history, directional selection led to the Warbler-finches evolution.
Directional selection is one of the different types of natural selection.
It increases in the proportion of individuals with an extreme phenotypic trait.
It causes a decrease in the number of individuals expressing intermediate phenotype, and the other extreme phenotype.
This selection presents more frequently in those cases in which interactions between living organisms and the environment modify in the same direction.
In the exposed example,
So, from the whole range, Warbler-finches only express one of the extreme traits, meaning that the species has suffered from the directional selection.
These traits probably increased the animals' fitness, and hence, they were favored by natural selection.
You will learn more about directional selection at
https://brainly.com/question/9761638
https://brainly.com/question/10519034
