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The distribution of phenotypes in a species can change when changing environmental conditions cause selection to occur. Which of the following best describes evidence that would indicate directional selection is occurring?

A shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype

A shift toward equal distribution of all phenotype frequencies, including intermediate and extreme phenotypes

An increase in the frequency of extreme phenotypes and a decrease in the frequency of intermediate phenotypes

An increase in the frequency of intermediate phenotypes and a decrease in the frequency of extreme phenotypes

The following best describes evidence that would indicate directional selection is occurring is a shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype.

What is directional selection?

Directional selection. In populace genetics, directional choice is a style of herbal choice wherein an intense phenotype is desired over different phenotypes, inflicting the allele frequency to shift over the years withinside the course of that phenotype.

As there the Directional selection is occurring and causing the A shift in a population's frequency curve from an intermediate phenotype to an extreme phenotype.