#chromosome locus

• Allele — One of the alternative forms or molecular variants of the same gene, structurally located at the same locus on a homologous chromosome. Alleles determine different variations of the same phenotypic trait (such as eye color or blood type), interacting with each other through relations of dominance, recessiveness, codominance, or incomplete dominance within diploid organisms.
• Allelomorph — 1. One of the alternative forms or molecular variants of the same gene, occupying the same locus on a homologous chromosome and controlling different variations of the same phenotypic trait; an allele. 2. Presenting allelomorphic characteristics, structures, or properties, belonging to a pair of alternative genes that interact through relations of dominance or recessiveness.