Nouns

(n)dominant(music) the fifth note of the diatonic scale
(n)dominant allele, dominantan allele that produces the same phenotype whether its paired allele is identical or different

Adjectives

(a)dominantexercising influence or control“television plays a dominant role in molding public opinion”, “the dominant partner in the marriage”
(a)dominant(of genes) producing the same phenotype whether its allele is identical or dissimilar
(s)prevailing, prevalent, predominant, dominant, rifemost frequent or common“prevailing winds”