The first time I have paid major attention to anything related to associations between rhesus negative blood and haplogroups, was when I have noticed the changes over the millennia within the Basque population. 49% of today’s Basque population has mtDNA H. The frequencies of mtDNA J and K are low now, they also were 1,500 years ago, but they were way higher 5,000 years ago. Talking 18-24% frequencies each. While over the millennia, major changes in mtDNA frequencies in Europe have taken place, we have not seen complete replacements of previously dominant haplogroup by previously absent ones as we have in many y-DNA examples showing invasions including the killing of men and mating with the women of the fallen. When … Continue reading Which female haplogroups are associated with being rhesus negative?