23andMe says that I'm in the 80th percentile, with <2% Neanderthal DNA. Then it lists several silly traits that I may have inherited.
There is also a footnote about Denisovans, quasi-humans who also interbred, but on a very limited basis.
They're probably right. I mean, I have been known to draw on the walls of my apartment.
I've read numerous times that the average European's DNA is ~2% Neanderthal, but I've also read that the difference between the human genome and the chimp genome is only 1-4%. So, that ~4% of DNA is 'human DNA', while the rest is basically hominid boilerplate. Neanderthals were presumably similar--~95% boilerplate hominid DNA and 5% 'Neanderthal DNA'.
So, if only 4% of my DNA is 'Human DNA', and 2% of that is 'Neanderthal DNA'... wouldn't that make me half human, half Neanderthal? (i.e. 96% boilerplate, 2% human, 2% Neanderthal). My assumption here is that the 5% 'human DNA' and the 5% 'Neanderthal DNA' overlap, and so any 'Neanderthal DNA' in my genome replaced 'human DNA' as opposed to boilerplate DNA, which might be wrong, but even with zero overlap, wouldn't that make me at least one third Neanderthal, two-thirds human? (i.e. 94% boilerplate, 4% human, 2% Neanderthal)
The 2% here isn't the full thing, it's of the "highly variable genes." So if the "boilerplate" is 90% (for example) then the 2% mentioned is of that final 10%, or 0.2% of the total.
I used 90% as a simpler example, but the reality is the "boilerplate" between Neanderthals and modern humans here is closer to 98-99%, which puts that 2% at around 0.0004% to 0.0002% of the total genome.