Many breeds originate from a small number of animals, that leads to mating inside kinship. The effect is various hereditary (genetic) diseases that are common in a few breeds, for instance, hip dysplasia (specifically in German shepherds), epilepsy, ataxia, oculoskeletal dysplasia, and others.
Origin of your dog
The dogs can be divided into crossbreeds and breeds with a new pedigree and a breed with out a pedigree.
Non-doggy breeds (hybrids): they’re the consequence of an unintended mating (crossing) of different varieties of dogs or canines whose source is unknown.