Dominant Allele

Definition

A dominant allele is an allele that expresses itself fully in an organism's appearance and masks the effect of any recessive allele present at the same locus on its homologous chromosome.

Related terms

Recessive Allele:

An allele that can be masked by a dominant allele.

Genotype:

The genetic makeup of an organism; combination of alleles.

Phenotype:

The physical expression or characteristics of an organism's genotype.