Final answer:
Incomplete dominance is the type of dominance where a heterozygous individual exhibits a phenotype that is intermediate between the two homozygous phenotypes, such as the pink flowers of snapdragons from a cross between red and white flowering plants.
Step-by-step explanation:
The type of dominance that occurs when the heterozygote has a phenotype that is intermediate to the phenotypes of the two homozygotes is known as incomplete dominance. This pattern of inheritance is characterized by a heterozygous genotype that expresses a phenotype which is not quite as pronounced as either homozygous dominant or homozygous recessive phenotypes, but instead, falls in between, resulting in a blend of both traits.
An example of incomplete dominance can be seen in the flower color of snapdragons, where a cross between a red-flowered plant and a white-flowered plant results in offspring with pink flowers, an intermediate phenotype. Genetically, when two pink snapdragons (CRCW) are crossed, they will produce offspring with red, pink, and white flowers in a 1:2:1 phenotypic ratio, which deviates from the typical 3:1 ratio observed in complete dominance scenarios.