Final answer:
Approximately 1-4 percent of the non-African genome has its origin in Neanderthals.
Step-by-step explanation:
Approximately 1-4 percent of the non-African genome has its origin in Neanderthals. The genetics of modern-day Europeans and Asians have been found to contain DNA sequences that are more similar to Neanderthals than to other contemporary human sequences. This suggests that interbreeding between Neanderthals and early humans was quite common. However, it's important to note that these percentages can vary among different populations and geographic regions.