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