Final answer:
Incomplete dominance is the pattern of inheritance in which a heterozygous genotype expresses a phenotype that is intermediate between the phenotypes of the two homozygous parents.
Step-by-step explanation:
Incomplete dominance is the pattern of inheritance in which a heterozygous genotype expresses a phenotype that is intermediate between the phenotypes of the two homozygous parents. This means that neither allele is completely dominant over the other, resulting in partial expression of the trait. For example, when a dark purple flower is crossed with a white flower and the offspring have light purple flowers, it is an example of incomplete dominance.