Polygenic traits, traits determined by more than one gene, often have phenotypes that are distributed on a bell curve. _______ occurs when one end of the bell curve is better adapted to the environment than the other.

directional selection
Hardy-Weinberg equilibrium
sympatric
This is allopatric speciation.
This is an example of stabilizing selection in a population because the organisms in the middle of the population have the best fitness for their environment.
The five conditions impacting this equilibrium are: mutations, nonrandom mating, genetic drift, migration, and natural selection.
Natural selection impacts single-gene traits because of the possible extinction of one trait or increase of another trait. If a trait is found to be not preferable in that environment, it could be eliminated through natural selection.
The total allele frequency in the Hardy-Weinberg equilibrium has to equal 1.

Explanation:

aliasger2709 aliasger2709 · Answer 2 · 2022-07-26T08:35:56+02:00

Polygenic traits are determined by various genes. Directional selection occurs when one end of the bell curve is better adapted. Thus, option B is correct.

What is directional selection?

Directional selection is a type of natural selection where the extreme phenotypical character is favored over another and results in the frequency of the allele distribution shifting towards the direction of the dominant phenotype.

It is a negative natural selection that is seen in the bell curve when one end or the species are better adapted to the surroundings or the conditions.

Therefore, the directional selection is the correct blank.

Learn more about the directional selection here:

https://brainly.com/question/12226774

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