How many cMs do third cousins share?
Since third cousins can share as much as around 100 cMs, it is entirely possible for a DNA matching software to report the relationship as closer than it actually is.
Is it OK to marry a fourth cousin?
Its legal in all 50 states to marry a cousin whos your second cousin or further. Third and fourth cousin marriages are the, quote, “best of both worlds.” Theyre breakfast food for dinner. You avoid the inbreeding risks of closer cousins, but your genes are just close enough that they naturally work well together.
Is it OK to marry your 5th cousin?
But according to Cummins, marriages between fifth cousins are fine. There are probably more distant-cousin marriages out there than you think. In fact, studies have suggested that marrying someone who is distantly related to you (a third, fourth, or fifth cousin) is actually optimal genetically.
How much DNA do you share with cousins?
Percent DNA Shared by RelationshipRelationshipAverage % DNA SharedRangeParent / Child Full Sibling50%Varies by specific relationshipGrandparent / Grandchild Aunt / Uncle Niece / Nephew Half Sibling25%Varies by specific relationship1st Cousin12.5%7.31% - 13.8%1st Cousin once removed6.25%3.3% - 8.51%7 more rows