What phenotype is an example of incomplete dominance?

Incomplete dominance occurs when the phenotype of a heterozygous organism is a blend of the phenotypes of both parents. In this genetic scenario, neither allele is completely dominant over the other, resulting in a third phenotype that is distinct and can be characterized as a mixture of the two parental traits.

For example, in the case of some flower colors, a red flower and a white flower may produce offspring that are pink. This is the hallmark of incomplete dominance and exemplifies how the expression of both alleles leads to a blending effect, rather than the complete dominance of one trait over another.

The other choices do not reflect this blending effect characteristic of incomplete dominance. A trait fully expressing one parent's feature or being identical to one parent's phenotype indicates full dominance. Similarly, a trait that is completely masked suggests complete dominance where one allele overshadows the expression of another, which again is not representative of incomplete dominance.