Thank you so much, so if I understood correctly:
1 CX female X 1 Heritage male (I should keep resulting females for reproducing - no dwarf gene guaranteed).
1 Heritage female X 1 Freedom Ranger male (I should keep the resulting males for reproducing - no dwarf gene guaranteed).
So now by...
So this means that if I manage to get a male CX to live enough to breed with a heritage normal female, and no dwarfs appear, it means I got 50% lucky and manage to weed out the dwarf gene from this cross?