RonO
2024-07-21 13:53:35 UTC
https://www.science.org/doi/10.1126/science.adi1768
The article seems to be open access.
The article claims to be able to identify the origin of fragments of DNA
in the ancient and extant genomes that have been sequenced. Neanderthal
and Denisovan genomes show evidence of past introgressions with other
Homo populations. The Denisovans seem to have interbred with a
population of Homo that left Africa around a half a million years before
them. Neanderthals apparently interbred with humans from Africa around
250,000 years ago. Some extant modern humans are descendants of hybrids
with Denisovans and have bits of Denisovan DNA and the more archaic Homo
genome. All of the extant humans descended from those that left Africa
around 60,000 years ago have bits of Neanderthal DNA in their genomes as
well as bits of DNA from the previous migration out of Africa (250,000
years ago) that we got from Neanderthals.
They have a time line based on their reanalysis of archaic and extant
genomes.
Neanderthals and Denisovans left Africa around 600,000 years ago.
Previous estimates range from 500,000 to 800,000 years ago.
At some point the Denisovans interbred with a population of Homo that
they met in Asia.
Modern humans ventured out of Africa around 250,000 years ago and
interbred with Neanderthals, but the African humans population died out
or was incorporated into the Neanderthal population. Previous estimates
of this interbreeding event have been between 200,000 and 500,000 years
from my recollections.
Modern humans left Africa and interbred with Neanderthals 50,000 to
60,000 years ago. The extant modern human populations that made it out
of Africa have a couple percent Neanderthal DNA and some of this
Neanderthal DNA is the 250,000 year old bits from a previous out of
Africa migration.
There is fossil DNA evidence for other African humans interbreeding with
Neanderthal between 60,000 and 250,000 years ago and since the
interbreeding 60,000 years ago, but these instances seem to be dead ends
that haven't left evidence in extant populations.
Ron Okimoto
The article seems to be open access.
The article claims to be able to identify the origin of fragments of DNA
in the ancient and extant genomes that have been sequenced. Neanderthal
and Denisovan genomes show evidence of past introgressions with other
Homo populations. The Denisovans seem to have interbred with a
population of Homo that left Africa around a half a million years before
them. Neanderthals apparently interbred with humans from Africa around
250,000 years ago. Some extant modern humans are descendants of hybrids
with Denisovans and have bits of Denisovan DNA and the more archaic Homo
genome. All of the extant humans descended from those that left Africa
around 60,000 years ago have bits of Neanderthal DNA in their genomes as
well as bits of DNA from the previous migration out of Africa (250,000
years ago) that we got from Neanderthals.
They have a time line based on their reanalysis of archaic and extant
genomes.
Neanderthals and Denisovans left Africa around 600,000 years ago.
Previous estimates range from 500,000 to 800,000 years ago.
At some point the Denisovans interbred with a population of Homo that
they met in Asia.
Modern humans ventured out of Africa around 250,000 years ago and
interbred with Neanderthals, but the African humans population died out
or was incorporated into the Neanderthal population. Previous estimates
of this interbreeding event have been between 200,000 and 500,000 years
from my recollections.
Modern humans left Africa and interbred with Neanderthals 50,000 to
60,000 years ago. The extant modern human populations that made it out
of Africa have a couple percent Neanderthal DNA and some of this
Neanderthal DNA is the 250,000 year old bits from a previous out of
Africa migration.
There is fossil DNA evidence for other African humans interbreeding with
Neanderthal between 60,000 and 250,000 years ago and since the
interbreeding 60,000 years ago, but these instances seem to be dead ends
that haven't left evidence in extant populations.
Ron Okimoto