It depends, is the short answer. Stripe Sinaloan/Nelson (Applegate Stripe) is recessive, two bred to each other produce 100% Stripe, and the stripes are variable though. Het for stripe is real.
There are two different Patternless versions of Sinaloan/Nelson, the more common was created through selective breeding and is a tribute to the efforts of the breeders who created them. They do not follow clear recessive or dominate inheritance. Many “in between” animals are produced that have some pattern reduction. Like Shannon said, I would not call them hets. The second type of Patternless is recessive, hets are possible. There are no “in between” animals. There are only 3 or four of these currently in existence.
Shannon answered about all the other types of Milks much better than I could.
