dominant genes definition
Home Â» Dominant. Definition. (genetics) (1) (Of, or pertaining to) An allele or a gene that is expressed in an organismâs phenotype, masking the effect of the recessive allele or gene when present. (2) (Of, or pertaining to) An organism that expresses the dominant gene (or allele). (ecology) (Of, or pertaining to) An organism or group of organisms having the most considerable influence or control in its ecological community among other organism.