Question

traits are passed on independently from each other. this means...
one trait will always affect the expression of another trait.
traits never have an affect on the expression of other traits.
the allele received for one trait does have an effect on which allele will be received for another trait.
the allele received for one trait does not affect which allele will be received for another trait.

Explanation:

When traits are passed on independently, it means that the inheritance of one trait's alleles does not influence the inheritance of another trait's alleles. This is in line with Mendel's law of independent assortment.

Answer:

the allele received for one trait does not affect which allele will be received for another trait.