Am I correct that the mix "ap" would be a pastel in appearance and be 100% het for albino.
No... doubles are notated on different alles.. its either aa, or Na for the albino gene, and the pastel is on a completely different alle.
Ok, in the Albino x pastle example, am I still correct that if you bred an Albino with a Pastel you get a Pastel in appearance, and het for Albino? If so, how would you illustrate that with letters?