What is the key to the recognition of codominance? the alleles affect more than one trait. the heterozygote expresses the phenotype of both homozygotes. the trait exhibits a continuous distribution. the phenotype of the heterozygote falls between the phenotypes of the homozygotes. the dominant allele is not always expressed.

The heterozygote expresses the phenotype of both homozygotes.

The reason is codominance occurs when neither of the alleles has dominance over the other one and so both alleles are expressed.  The key to the recognition of codominance is recognizing that the heterozygote is expressing both of the homozygous alleles.  To determine this, first you must know what the homozygous alleles are.  Let's say that a cow has the allele for red hair and the allele for white hair.  A homozygous red hair cow would have red hair. A homozygous white hair cow would have white hair.  If the cow is heterozygous and it has both red and white hair, then the cow is exhibiting codominance.  Neither the allele for red hair nor the allele for white hair has dominance over the other, and both are expressed. A form of dominance in which the alleles of a gene pair in a heterozygote are fully expressed thereby  resulting in offspring with a phenotype that is neither dominant nor recessive.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.