Codominance is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent. If the alleles are different, the dominant allele usually will be expressed, while the effect of the other allele, called recessive, is masked.
Example:
A brown cow and a white cow have a baby. The baby cow is white with brown spots. The baby cow is a result of co-dominant offspring.
