poodle
Miki is a popular toy dog breed. A purebred Miki would be a dog who only has Miki in it's genetic make up. Often these dogs are certified by experts and will be able to demonstrate proof of their purebred status.
The six main groups of purebred dogs recognized by the American Kennel Club are Sporting, Hound, Working, Terrier, Toy, and Non-Sporting. Each group is based on the original purpose for which the breeds were developed.
All purebred dogs.
Just by having a chihuahua you have a toy. Toy is the chihuahua's breed classification. A chihuahua is a toy breed of dog. Some chi's are bigger, some smaller...but all are toy dogs.
Crossed or Mutts
A purebred short can be about a variety of different animals. Usually purebred shorts describe dogs or cats and their breeds.
Cuteness is in the eye of the beholder. Teacup dogs are a bit smaller; while toy dogs are only slightly larger. I think at some point tiny dogs begin to look like other critters. So I'm partial to toy on this one...but this is purely an opinion question.
The Kennel Club
No, but the puppies will me mixed, not purebred.
Yes, variations in coat color in purebred dogs can result from dominant and recessive genes. Dominant genes can override recessive genes to produce certain coat colors, resulting in the observed variations in purebred dogs.
Dogs are more likely to go toward a human, but every dog is different and some dogs may go for a toy rather than a human.
nothing, dogs not purebred, it can't be bred to make a purebred, its worthless.