DNA Q&A: Shared DNA for Cousins Related Multiple Ways

Sign up for the Family Tree Newsletter! Plus, you’ll receive our 10 Essential Genealogy Research Forms PDF as a special thank you.

Get Your Free Genealogy Forms

"*" indicates required fields

Q. My grandparents were second cousins (who typically share 3.125 percent of their DNA), and Grandma’s sister married Grandpa’s brother. So my mother had double first cousins (about 25 percent shared DNA) who were also third cousins (.781 percent shared DNA). How would I calculate the amount of shared DNA between mom and these cousins, View Website VIP Subscription

DNA