Codominance occurs when a recessive gene overpowers a dominant gene. there is an exact compromise between two genes. a dominant gene overpowers a recessive gene. genetic effects are overpowered by environmental factors.

The correct answer there is an exact compromise between two genes (alleles). The codominance is a form of dominance when the alleles of a gene pair in a heterozygote are both fully expressed. As a result of this, offspring have a phenotype that is neither dominant nor recessive. Example of codominance is found in ABO blood types. When you have allele Ia and allele Ib the expressed blood type is AB.