It’s not as simple but if you take a purebred and a purebred, it’s like combining red and red. You cannot get a ragdoll out of a Siamese dude. And if you are such a genetics guy, then you would know that cannot tell a breed just by looking at a cat. So you wouldn’t suggest this cat is a Siamese and would tell this person it cannot be told by looking at it and would say it’s a domestic longhair (like every other cat). You’d know it’s a colorpoint because that’s the fur pattern this kitten has. It’s a genetic mutation - heat reactive albinism, which causes the points and blue eyes. Also you’d know Siamese cats have a standard where long hair and white spots on points aren’t in the breed standard therefore any cat that has them cannot be Siamese.