Cellular DNA wise you get 50% half from each parent, quarter from each grand parent and so on. Lots of scope for your ancestors to be different and not at all affect you.

Inside your cells you also have mitochondria with their own DNA and those you get 100% from your mother and she 100% from hers and so on.

Lastly the 50% and 100% above are approximate since there are always a few of "errors" (yes "errors"!) that make you you.