Snapdragons occur in nature as either green or yellow plants. A green snap the genotype CC. A yellow snapdragon is hete crosses two yellow snapdragons, and one-third of the offspring are green and two-thirds of the offspring are and has and has the genotype Cc. Suppose that a gardener n is yellow What type of allele could be responsible for the 2:1 offspring ratio seen when two yellow snapdragons are crossed?

O dominant allele
O polymorphic allele
O recessive lethal allele
O codominant allele