Average % genetic makeup shared between biologically related individuals
Monozygotic twins
100%
Dizygotic twins
50%
Siblings
50%
Child and each parent
50%
Child and each grandparent
25%
1stdegree relative -Niece (nephew),
Uncle (Aunt)
25%
2nddegree relative –cousins, etc.
12.50%
Members of the same “ethnic”group