Comb Shape in Chickens Is Controlled by

Multiple Choice

Comb shape in chickens is controlled by

A) the epistatic interaction of two genes, resulting in two different phenotypes.
B) the interaction of three alleles and codominance, resulting in four different phenotypes.
C) the interaction of two genes with complete dominance, resulting in four different phenotypes.
D) one gene with incomplete dominance, resulting in three different phenotypes.
E) none of the above.