How can I tell if my cat is a siberian?

I adopted a kitten 4 ys ago. She is now huge! After seeing a show on cats I think she has some Siberian traits. She has medium length hair, sheds in clumps, and is sooo a puppy. When my sister (who is allergic to cats) came to visit I had her hug my cat, she had no reaction to her, unlike my other cats who made her itch. Is there any other way of knowing if she's a siberian other than a dna test?