Question

some people have freckles, and some people do not have freckles. if a child has freckles, at least one parent has freckles. however, the child may have a sibling that does not have freckles. which statement best describes the presence of freckles?
freckles are not determined by dna.
there are two alleles for freckles.
there is no dominant allele for freckles.
freckles are determined by two genes instead of by one.

Explanation:

The fact that if a child has freckles, at least one parent has freckles suggests a dominant - inheritance pattern. This implies there are two alleles for the trait (freckles), with the allele for freckles being dominant. Freckles are determined by DNA, there is a dominant allele for freckles, and there is no indication that two genes determine freckles based on the given information.

Answer:

There are two alleles for freckles.