It's impossible to tell a cat's heritage by their personality. Personality by breed is more a necessity, but not simultanious necessity. I.e., if a cat is of a certain breed, then it is most likely to present certain personality, however, the other way doesn't work. If a cat has certain personality, it is not necessary that the cat is of that certain breed. There are a whole lot of mutts with the personality you just described.
PS: DNA tests on breed is not available for cats. Even for dogs it's not accurate. However, DNA test on color gene is doable. If you are really determined to know, you can test your cat to see if she has color point gene. But even if she does, it's no guarantee she has any Siamese in her. It's just more possible.
PS: DNA tests on breed is not available for cats. Even for dogs it's not accurate. However, DNA test on color gene is doable. If you are really determined to know, you can test your cat to see if she has color point gene. But even if she does, it's no guarantee she has any Siamese in her. It's just more possible.