Answer:
Codominance
Step-by-step explanation:
In some examples, one allele is dominant to another one. This means that it will be expressed over its recessive counterpart. So if an individual carries a dominant and a recessive allele, they will show the dominant phenotype. To display the recessive phenotype, the genotype must not have the dominant allele, and have 2 copies of the recessive gene instead.
In this case, heterozygotes express both alleles. This is an example of codominance. In codominance, neither allele is dominant/recessive, and the phenotypes of both alleles are expressed in heterozygotes