Which is the best definition of directional selection?

A. A process by which two species can no longer reproduce
B. A process by which one of the extreme variations of a trait is favored
C. A process by which both extreme variations of a trait are favored
D. A process by which average individuals in a population are favored



Answer :

Final answer:

Directional selection in biology favors one extreme trait variation, shifting the allele frequencies in a population.


Explanation:

Directional selection is a mode of natural selection where one extreme variation of a trait is favored over the other. This process causes a shift in the distribution of that trait towards the favored extreme, leading to changes in allele frequencies within a population.


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