Question

an allele for brown eyes is expressed over an allele for blue eyes. blue eyes are...
a genotype.
a dominant trait.
a recessive trait.
a recessive trait, a dominant trait, and a genotype.

Explanation:

In genetics, a dominant allele masks the expression of a recessive allele. Since the allele for brown eyes is expressed over the allele for blue eyes, blue - eye allele is masked, making blue eyes a recessive trait. A genotype refers to the genetic makeup, not the physical trait itself.

Answer:

C. a recessive trait