About 20% of the Neanderthal genome survives in modern humans, with about 1-4% of most people's DNA being such for people with ancestry outside sub-Saharan Africa, and about 0.3% for those with (recent) roots in sub-Saharan Africa.
But what would a person with all those 20% in their DNA be like? What would they look like? Any differences beyond the visible ones?
@Gurre I always find these genetic comparisons interesting when put into context with other stuff humans share DNA. Apologies if you already get this.
Published data has humans sharing 50% of our genes with fungi, 98.7% with chimpanzees, 98.8% with bonobos, 97.5% with mice and 20-40% with plants. The human share is about 99.8%.
I think the maximum share with Neanderthals would be, say, 20% of 0.2%. Which is clearly important but maybe not as big as it might first appear. YMMV