could you explain them in a bit more detail for us
you can tell genetics via punnet squares, every single trait (lenght of coat, colour, height, greying gene) occurs due to a specific gene in a chromosome.
If the mother has a long coat for example and the father, it doesnt garauntee that the pup will. if we use a capital L for the gene that makes a long coat and a small l for the gene that makes a short coat then if the long coat or L is dominant and the small l is ressesive the mother could have the genotype of Ll as could the father Ll so they would both have the phenotype of b