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Interbreeding

All articles tagged with #interbreeding

Brain scans erase Neanderthal cognitive gap with modern humans
science28 days ago

Brain scans erase Neanderthal cognitive gap with modern humans

International brain-imaging analysis shows that regional brain-volume differences among modern humans exceed the differences between Neanderthals and Homo sapiens, arguing against the idea that cognitive limits drove Neanderthal extinction; the researchers note Neanderthals likely possessed complex cognition and behaviors (and possibly speech) and may have interbred with modern humans, leaving Neanderthal genes in many people today, with the study published in PNAS.

via ScienceAlert|
#brain#cognition#evolution
Ancient mating bias reshapes modern DNA: Neanderthal men, modern women
science2 months ago

Ancient mating bias reshapes modern DNA: Neanderthal men, modern women

New research from the Tishkoff lab shows that Neanderthal DNA on the human X chromosome is surprisingly scarce, while modern-human DNA is enriched on Neanderthal X chromosomes by about 62% compared with their other chromosomes. This pattern points to sex-biased interbreeding where Neanderthal males mated with anatomically modern human females, shaping the modern genome more through mating dynamics than simple genetic incompatibility. Published in Science, the findings suggest ancient social patterns left a lasting imprint on our DNA and offer new insight into human evolution.

via Earth.com|
#ancient-dna#human-evolution#interbreeding
Ancient Neanderthal Men Likely Paired More Often with Early Humans
science2 months ago

Ancient Neanderthal Men Likely Paired More Often with Early Humans

A study published in Science finds Neanderthal males interbred with human females more often than the reverse, suggesting a non-random partner pattern possibly driven by migration or social dynamics; researchers also note that hybrids from Neanderthal mothers and human fathers may have had lower survival, helping explain the persistence of Neanderthal DNA (up to about 2%) in modern European and Asian populations.

via Yahoo News UK|
#early-humans#interbreeding#mating-patterns
DNA clues reveal sex-biased mating between Neanderthal men and modern humans
science2 months ago

DNA clues reveal sex-biased mating between Neanderthal men and modern humans

A Science study finds Neanderthal men and anatomically modern human women interbred more than the reverse, as Neanderthal DNA is disproportionately found on the human X chromosome. The result points to sex-biased gene flow and raises questions about the social dynamics behind these ancient matings, which researchers are looking to explore further.

via Yahoo|
#genetics#interbreeding#mating-patterns
Sex-biased interbreeding left a lasting Neanderthal DNA pattern in modern humans
anthropology2 months ago

Sex-biased interbreeding left a lasting Neanderthal DNA pattern in modern humans

A genetic analysis comparing Neanderthal genomes with African references shows Neanderthals carried far more modern human DNA on their X chromosome than on other chromosomes, while modern humans have very little Neanderthal DNA on their X. The researchers argue that this pattern results from sex-biased interbreeding—likely Neanderthal males with modern human females—rather than widespread genetic incompatibility. Computer simulations using a mating bias reproduce the observed distribution, suggesting social/partner-choice factors shaped inheritance. The team plans to investigate population structure to determine which sex moved between groups and how cultural practices influenced mating in ancient encounters.

via Archaeology News Online Magazine|
#anthropology#dna#interbreeding
Male Neanderthals more often paired with human women, new study finds
science2 months ago

Male Neanderthals more often paired with human women, new study finds

A new Science study finds interbreeding between Neanderthals and modern humans was strongly sex-biased, with mating preferentially between male Neanderthals and female Homo sapiens. This bias helps explain the “Neanderthal deserts” on the human genome, especially the scarcity of Neanderthal DNA on the X chromosome, and why Neanderthal genes are unevenly distributed across non-African populations. Analyzing genomes from African populations with no Neanderthal ancestry and comparing them to Neanderthal genomes, the researchers conclude mate preference best accounts for the pattern, while noting that other evolutionary factors may also have contributed and that future work will explore Neanderthal social structures.

via Live Science|
#genomes#interbreeding#neanderthals
Ancient DNA Reveals Strong Mate Preferences Across Neanderthals and Modern Humans
science2 months ago

Ancient DNA Reveals Strong Mate Preferences Across Neanderthals and Modern Humans

A Science study shows that Neanderthal and modern-human ancestry influenced ancient mating: men with more Neanderthal DNA tended to pair with women with more modern-human DNA, suggesting a strong historical preference that helped shape the Neanderthal DNA in present-day genomes, though whether this reflects attraction or other factors remains uncertain.

via The New York Times|
#genetics#human-evolution#interbreeding
Neanderthals fell to a mosaic of factors, not a single foe
archaeology3 months ago

Neanderthals fell to a mosaic of factors, not a single foe

Extinction of Neanderthals appears to be the result of a mix of regional pressures: small, isolated populations prone to inbreeding and mutational burden, competition with expanding modern humans, and varied demographic dynamics across Eurasia. Genetic evidence confirms interbreeding with Homo sapiens, meaning Neanderthals contributed to the modern human genome, but there is no single smoking gun or uniform fate—different Neanderthal groups disappeared for different reasons over time.

via Live Science|
#ancient-dna#archaeology#extinction