When Many Genes Work Together to Determine a Characteristic, There

Multiple Choice

When many genes work together to determine a characteristic, there may be a large range of phenotypes that are expressed. Why is this?

A) ​Because each allele of the genes may be differently structured, leaving a large variety of outcomes.
B) ​Because there are many combinations of dominant and recessive genes that can lead to various levels of the characteristic being expressed.
C) ​Because each gene is contributed to by a different chromosome, bringing more phenotypical variety into the characteristic.
D) ​Because the genes all work to "cancel" each other out, leaving only one "odd" gene to express the phenotype.