what genetics might be part of my blood with tall brown haired people in my family
If you're of Polish descent then it's really no way of figuring out your genetics.
Our country was an arena of countless wars throughout history and there were
Russian, Tatar, Swedish, German, Ukrainian, Turk and many other armies rolling
through our territory and adding to the gene pool. We've also had Scottish,
Italian, Jewish (and probably about a dozen of other ethnic groups) people
living here and mixing with the local population :)
Being a Pole has nothing to do with genetics, skin or hair colour. It's about
your language, culture, heart and sould - nothing else.