How Rh- were European Early Modern Humans?

Cro-Magnons or European early modern humans (EEMH) were the first early modern humans (Homo sapiens) to settle in Europe, migrating from western Asia, continuously occupying the continent possibly from as early as 56,800 years ago. They interacted and interbred with the indigenous Neanderthals (H. neanderthalensis) of Europe and Western Asia, who went extinct 40,000 to 35,000 years ago.

Genetic evidence suggests early modern humans interbred with Neanderthals. Genes in the present-day genome are estimated to have entered about 65 to 47 thousand years ago, most likely in West Asia soon after modern humans left Africa. In 2015, the 40,000 year old modern human Oase 1 was found to have had 6–9% (point estimate 7.3%) Neanderthal DNA, indicating a Neanderthal ancestor up to four to six generations earlier, but this hybrid Romanian population does not appear to have made a substantial contribution to the genomes of later Europeans. Therefore, it is possible that interbreeding was common between Neanderthals and Cro-Magnons which did not contribute to the present-day genome. The percentage of Neanderthal genes gradually decreased with time, which could indicate they were maladaptive and were selected out of the gene pool.