A gene that actively controls the expression of a trait is called a _______ gene.

A) recessive
B) mutated
C) recombinant
D) dominant

Dominant Gene

A gene that expresses its phenotype over another gene's phenotype when the two are paired together in an organism.

Recessive

Describes a genetic trait that is expressed in an organism’s phenotype only when two copies of the gene are present, one from each parent.