How can alleles show incomplete dominance?

When an allele isn't completely expressed over its paired allele for a specific trait, the result is an intermediate of the two allele, a third phenotype.

This is termed as incomplete dominance.

what's the question?

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides