What is the term for both alleles being equally expressed in a heterozygote?

Codominance refers to a genetic situation in which both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that showcases characteristics from both alleles. This means that neither allele is recessive, and both contribute equally to the phenotype. For instance, in a case where one allele codes for red flower color and the other for white flower color, a plant that is heterozygous for flower color would produce flowers that are both red and white, exhibiting a mixture of both traits.

Continuous variation refers to a range of phenotypes that show gradual differences rather than distinct categories, commonly resulting from polygenic inheritance - where multiple genes influence a single trait.

Incomplete dominance is a situation where the phenotype of the heterozygote is intermediate between the phenotypes of the homozygotes.

Polygenic traits are influenced by multiple genes, and the resulting phenotypes exhibit a range rather than distinct categories, such as human height or skin color.

Thus, the accurate term for the scenario where both alleles are equally expressed is codominance.