Need !
choose the best explanation of codominance.
a. genes are blended during homologous recombination.
b. in a heterozygote, both alleles are expressed.
c. in a heterozygote, both alleles combine to form an intermediate phenotype.
d. a heterozygote is considered a carrier for the recessive allele.

In a heterozygote, both alleles are expressed. - is the best explanation of codominance.

Explanation:

Closely related to incomplete dominance is codominance, in which both alleles are simultaneously expressed in the heterozygote. 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.

answer; /// i believe that the correct answer is ( monophasic ); ethinyl estradiol- ethynodiol diacetate is a monophasic oral contraceptive agent; ///