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?
A
Freckles are not determined by DNA.B
There are two alleles for freckles.C
There is no dominant allele for freckles.D
Freckles are determined by two genes instead of by one.