For each of the following partial diploids indicate whether enzyme synthesis is constitutive or inducible (see Problem 17.5 for dominance relationships):
(a) I⁺O⁺Z⁺Y⁺/I⁺O⁺Z⁺Y⁺, 

(b) I⁺O⁺Z⁺Y⁺/I⁺OcZ⁺Y⁺,

(c) I⁺OcZ⁺Y⁺/I⁺OcZ⁺Y+, 

(d) I⁺O⁺Z⁺Y⁺/I⁻O⁺Z⁺Y⁺,

(e) I^-O⁺Z⁺Y⁺/I⁻O⁺Z⁺Y⁺.

Why?