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.

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

looks like the answer is     c     to me!