noun, noun which may take the genitive case particle 'no'
allelic character; allelomorphic character
Technical term in genetics referring to a trait determined by alleles. Used in scientific contexts.
In Mendel's laws, allelic characters are divided into dominant and recessive.
対立遺伝子 refers specifically to alleles (gene variants), while 対立形質 refers to the observable traits determined by those alleles.
Compound of 対立 (opposition) and 形質 (trait, character), likely a calque from Western genetics terminology.