Final answer:
Incomplete dominance is the type of inheritance where traits blend and one allele is only partly dominant over the other, resulting in an intermediate phenotype.
Step-by-step explanation:
The type of inheritance practiced here, where traits blend, is called incomplete dominance (option a).
In incomplete dominance, one allele is only partly dominant over the other allele, resulting in an intermediate phenotype. This means that the traits of both parent alleles are blended together, rather than one completely dominating over the other.
An example of incomplete dominance is seen in snapdragons, where the cross between red-flowered plants and white-flowered plants produces pink-flowered plants.