Explain why polygenic traits are expressed through quantitative variation, using skin color as an example.

Polygenic traits are quantitative because their phenotype expression depends on several different alleles found on different chromosomes.

Explanation:

In this case each dominant capital gene produces one unit of skin color, therefore, a wide range of intermediate skin colors are produced depending on the number of dominant capital genes.

If there are more alleles present for darker skin tone, then the offspring will have darker skin pigment than the parents may have.

There can be varying expressions of pigment color from dark to light based on the alleles received, even in the same family.

The sum of the allele combinations determines the expression of the trait from one degree to the other.

A bell curve shows the quantitative variation.

more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )