Question

how is codominant inheritance different from incomplete dominant inheritance?
in codominance, two alleles are expressed equally; in incomplete dominance, heterozygotes have an intermediate phenotype.
in codominance, all genes are recessive; in incomplete dominance, one gene is recessive to two dominant genes.
in codominance, two alleles are expressed equally; in incomplete dominance, there is only one allele in the system.
in codominance, one gene is recessive to two dominant genes; in incomplete dominance, all genes are recessive.
in codominance, the two alleles cooperate to make an intermediate phenotype; in incomplete dominance, the heterozygote shows the recessive phenotype.

Explanation:

• Codominance: Both alleles in a heterozygote are fully expressed. For example, in some flower species, if one allele codes for red petals and another for white petals, a codominant inheritance would result in flowers with both red and white patches.
• Incomplete Dominance: The heterozygote has a phenotype that is intermediate between the two homozygous phenotypes. For instance, if a red - flowered plant (RR) and a white - flowered plant (rr) are crossed, in incomplete dominance, the heterozygote (Rr) has pink flowers (an intermediate phenotype).

Answer:

In codominance, two alleles are expressed equally; in incomplete dominance, heterozygotes have an intermediate phenotype.