ok let's take cinnamon as a codom and albino as a reces. het.
aa = albino
Cc = cinn

You cross cinn het. alb x cinn het. alb:

CcAa x CcAa

-----CA-----cA----Ca-----ca

CA CCAA CcAA CCAa CcAa

cA CcAA ccAA cCAa ccAa

Ca CCAa CcAa CCaa Ccaa

ca CcAa ccAa Caca ccaa