Tag

Gene Flow

All articles tagged with #gene flow

science1 month ago•4 min saved

Human Origins Reframed as a Continental Genetic Network

A Nature study shows modern humans likely arose from a network of intermingling African populations rather than a single ancestral group. By analyzing genomes from southern, eastern, and western Africa (including 44 Nama genomes), researchers found the earliest detectable split occurred about 120,000–135,000 years ago, with long, ongoing gene flow among weakly differentiated groups—forming a 'weakly structured stem' rather than a clean family tree. This view alters how fossils are interpreted and is supported by subsequent research highlighting deep African diversity.

via Science Daily|

#africa #ancient-dna #gene-flow

science2 months ago•3 min saved

Ancient mating bias: Neanderthal men more often mated with modern humans

A genetic study shows a sex-biased interbreeding pattern between Neanderthals and anatomically modern humans, with Neanderthal males more frequently mating with human females, helping explain the uneven distribution of Neanderthal DNA on the human X chromosome.

via The Guardian|

#evolution #gene-flow #interbreeding

science2 years ago•4 min saved

Unveiling the Genetic Legacy: Tracing Gorillas' Hidden Evolutionary Lineage

A recent study published in Nature Ecology and Evolution reveals that there was a gene flow event from an extinct gorilla population to present-day eastern gorillas. By analyzing the genomes of gorillas, researchers discovered that up to 3% of the genome of eastern gorillas contains genes from this extinct lineage, which separated from the common ancestors of all gorillas over 3 million years ago. The study also found that the genetic input from the extinct ancestors can have functional effects on present-day species, such as the introduction of a bitter taste receptor gene that may have been under positive selection. This research provides valuable insights into the evolutionary history of gorillas and the effects of gene flows from extinct populations.

via SciTechDaily|

#evolution #extinct-lineage #gene-flow

science2 years ago•4 min saved

Extinct gorilla's genetic legacy found in eastern gorillas

A research study led by the University of Vienna and the Institute of Evolutionary Biology has discovered evidence of gene flow from an extinct gorilla population to present-day eastern gorillas. The study analyzed the genomes of gorillas using modern statistical methods and found that up to 3% of the genome of eastern gorillas includes genes from the extinct population. The researchers also identified functional effects of this genetic input, including the introduction of a bitter taste receptor gene that may have been under positive selection. The study provides valuable insights into the evolutionary history of gorillas and the effects of gene flow from extinct populations.

via Phys.org|

#evolutionary-history #extinct-population #gene-flow