Family DNA Percentages

What do you have in common with your grandparents, uncles, half-siblings, nephews and grandchildren? 25%.

  100% 50% 25% 12% 6%
-4         parents of parents of parents of parents
-3       parents of parents of parents siblings of parents of parents of parents
-2     parents of parents siblings of parents of parents half-siblings of parents of parents
-1   parents siblings of parents half-siblings of parents children of siblings of parents of parents
0 you siblings half-siblings children of siblings of parents children of half-siblings of parents
+1   children children of siblings children of half-siblings children of children of siblings of parents
+2     children of children children of children of siblings children of children of half-siblings
+3       children of children of children children of children of children of siblings
+4         children of children of children of children

Each row is a generation. Each column is an expected percentage of shared genes.