Codominance is a term used in genetics that describes a relationship between two alleles of a specific gene that are both expressed equally. Synonyms for codominance include complete dominance, balanced dominance, and sharing dominance. Complete dominance is a term used to refer to a relationship between two alleles of a gene where one allele completely masks the expression of the other allele. Balanced dominance refers to a situation where both alleles of a gene are entirely expressed, but neither allele dominates over the other. Sharing dominance is another synonym for codominance, and it describes a situation where both alleles of a gene are partially expressed, resulting in a unique phenotype.