Nahhh, close, but ::NO CIGAR::!!<quoted text>
Ok let us assume that west Africans interbred with H.Heidelbergensis and got 4% H.Heidelbergensis, do you really believe the 4% would alter their phenotype.
The following Euroasians have neanderthal admixture:
Pupua New Guinea 8% neanderthal?
White man 4% neanderthal?
Chinese Man 8% Neanderthal?
Now my friend, in what way did neanderthal admixture affect their phenotype?
I think white people did not like the idea of Africans being the only true human so they came up with this "concoction" of H.Heidelbergensis admixture. And how convenient, it had to happen soon after OOA. Why did it no happen before? LOL!
...and some of your numbers are just a bit exaggerated.
Although Denisovan and Neanderthal are somewhat more closely related, they are still different and the Chinese type and the Papua New Guinean type are part Denisovan, not Neanderthal.
After all,The genetic difference between 'MODERN HUMAN' and 'CHIMPANZEE' is less than 2-percent.
That 3- to 4-percent Neanderthal difference that has been retained by Caucasians may seem small but it doesn't take much genetic coding to make a HUGE difference, especially when that difference spans two separate species.
A 4-percent sub-Saharan African admixture in a Eurasian doesn't really amount to a whole lot of difference, but then there shouldn't be a whole lot of difference between one Modern Human and another.
Also, a different "4-percent" Modern Human admixture, in someone who is already a Modern Human, is not the same as having a 4-percent difference, in your genetic coding, from that of others of your species.