My great grandma had a big, hooked nose. My grandma ended up with it, so did my dad, and so did I. But my brother didn't... he got my mom's nose.

The markers is like a family trait thing. They're all related, some get the wide stripe, some don't. If my great grandma was het piebald it doesn't mean I am just because I have her nose, nor does it mean my brother isn't because he has a different nose.

Does that make any sense?