This question keeps coming up, so let’s start with much of SE Asia where Rh- frequencies are at only around 0.5%: Many of those categorised as Rh- in South East Asia are actually weak D. That leaves a tiny amount of true Rh negatives that can easily be explained by migration from the west (and north, Russia). The Ainu of Japan come to mind. So do the Uyghurs of China. In Africa, around 90% of those categorised as Rh- are actually partial D. Again, the remaining 10% of already low numbers can be due to colonization. And then there are a few tribes that stand out. When you Google image “Berber people”, you will likely come across some pictures of … Continue reading Is Rh- blood Caucasoid?