Question

What kind of inheritance is it when the offspring have spots of different colors from its parents? Like a brown dog with a white dog makes a white/brown spotted dog.

Answer 1

In dogs, spots of brown are controlled by the S locus, the brown spots on white indicate piebald inheritance.

http://www.bordercolliesociety.com/index_breedcolor.htm

Notice that the color, the shade, the hair tinting at the base, the spotting, and markings are all controlled by different genetic loci.