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

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 cousins share just over six percent of