A pair of genes that control a trait is referred to as? by Sunday | Sep 8 | Biology JAMB | 0 comments A. an allele B. recessive C. dominant D. a hybrid Correct Answer: Option A – an allele Users Also Read These:If both parents are heterozygous for a trait, the…The contrasting pair of genes affecting a trait and…The pair of genes expressed in a heterozygous…The genes affecting the same trait and are located…Identical twins inherit their genes from?