dominant and recessive definition biology
2. recessive - (of genes) producing its characteristic phenotype only when its allele is identical. genetic science, genetics-the branch of biology that studies heredity and variation in organisms. dominant - (of genes) producing the same phenotype whether its allele is identical or dissimilar.n an organism having two different genes for a trait, the recessive form is suppressed by its counterpart, or dominant, form located on the other of a pair of chromosomes.