NB: I'm not a scientist, so could be wrong. The 2% here isn't the full thing, it's of the "highly variable genes." So if the "boilerplate" is 90% (for example)

NB: I'm not a scientist, so could be wrong. 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.