«What has emerged from our study as well as from other work on introgression is that interbreeding with
archaic humans does indeed have functional implications for modern humans, and that the most obvious consequences have been in shaping our adaptation to our environment — improving how we resist pathogens and metabolize novel foods,» Kelso says.
Not exact matches
Intermixing
does not surprise paleoanthropologists who have long argued on the basis of fossils that
archaic humans, such as the Neandertals in Eurasia and Homo erectus in East Asia, mated with early moderns and can be counted among our ancestors — the so - called multiregional evolution theory of modern
human origins.
The researchers were searching for
archaic DNA sequences in those
human genomes at frequencies much higher than would be expected if those genes weren't
doing people any good.
Now, a study uses a new method that relies on ancient proteins to identify and directly date Neandertal bone fragments from Grotte
du Renne and finds that the connection between the
archaic humans and the artifacts is real.
When they
did finally begin to disperse across the globe, according to this model, they replaced the
archaic human species they encountered along the way, including the Neandertals, without interbreeding with them.
We have one feature that primates, Neanderthals,
archaic humans — any species, for that matter — don't possess: a chin.
It is true that, for unknown reasons, Neandertal culture
does not display all the refinements of the Cro - Magnons, but the same is true of many early modern
humans and
archaic forms of Homo sapiens.
No one knows when or how these
humans disappeared but, according to Professor Paabo, it is very likely something to
do with modern people because all the «
archaic»
humans, like Denisovans and Neanderthals disappeared sometime after Homo sapiens sapiens appeared on the scene.
Overall, our results suggest that iAI may not represent the full picture of positive selection on archaically introgressed haplotypes in
humans and that more work needs to be
done to analyze the role of SI in the
archaic introgression landscape of living
humans.