An individual who expresses a recessive phenotype must have what genotype? an individual who expresses a recessive phenotype must have what genotype? heterozygous heterozygous with incomplete dominance homozygous dominant homozygous recessive
They must have a homozygous genotype,as the presence of a dominant would cause the recessive trait to not show. The codominant would show if both were dominant, however that is not the case.