Marrying A First Cousin Not That Harmful To Family Tree, Study Says

Follow KDKA-TV: Facebook | Twitter
CBS Local — With online genealogy companies growing in popularity, a new study is suggesting that marrying a cousin should not be considered a bad thing for your family tree.
Data scientists at Columbia University have published a report in the journal Science that examines the DNA of a 13 million member family tree and data found in online genealogy profiles.The research found that first cousins share about 12.5 percent of the same DNA. Second cousi