“As you read this genetic chronicle, please do not lose sight of the dignity of the human beings who lived this history and the rich complexity of individual existences that are lost in the telling.”
through a revolution in the scientific study of human history. Because of recent technical developments in approaches for recovering and analyzing DNA, plus sequencing whole genomes, geneticists’ and archaeologists’ ability to ask and answer questions about the past has improved dramatically.
As you read this genetic chronicle, please do not lose sight of the dignity of the human beings who lived this history and the rich complexity of individual existences that are lost in the telling. The story I tell here is akin to reconstructing a person’s entire life by stitching together the photos they posted on Instagram. Not inaccurate, necessarily, just … incomplete.
This population explosion is exactly what we expect to see in the genetic record when people move into new territories, where resources are far less limited, there is no competition from other people, and the game animals have no natural fear of humans, having never seen them before. Like all their children, the 2-year-old boy was treasured by his people. To honor him, they buried him underneath a rock shelter with great care and love, sprinkling his body with red ochre. Everyone in the community contributed to the toolkit that he would take with him into the afterlife: Some placed carefully flaked finished tools—projectile points, knives, and scrapers for hides—others left the cores that he would need to make new ones.
The radiation of dog lineages that mirrors human lineages is extremely strong evidence for this model of migration. This split between the NNA and SNA branches tells us a lot about the initial peopling of the Americas. For one thing, most genetic evidence indicates that the split took place south of the ice sheets, because representatives of Ancient Beringians are equally related to members of the NNA and SNA groups.
Canada Latest News, Canada Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
“Deep Sequencing” Identifies Several New Genetic Variants in Vascular AnomaliesThe study captured genetic variants at extremely low levels, and dozens of patients began new therapies as a result of the findings. Researchers from Children’s Hospital of Philadelphia (CHOP) recently discovered that extremely thorough “deep sequencing” of the genome in tissue samples and cell-f
Read more »
Mike Miles and Editorial Board: Read the transcript (Opinion)The Houston Chronicle Editorial Board and Mike Miles, the new superintendent of HISD,...
Read more »
Watchdog group wants to cut down Peoples Gas rate hikeCitizens Utility Board is working to cut more than $100 million from a record Peoples Gas rate hike request
Read more »
New AI tool searches genetic haystacks to find disease-causing variantsJust as ChatGPT can learn how to predict human speech by having engineers feed it a wealth of text, the new algorithm has been trained to make medical predictions based on reading genomes.
Read more »
NIH Scientists Discover Protein Behind Rare Genetic Skin DisorderGenome sequencing reveals genetic basis for disabling pansclerotic morphea, a severe inflammatory disease. Researchers at the National Institutes of Health (NIH) and their colleagues have identified genomic variants that cause a rare and severe inflammatory skin disorder, known as disabling pansc
Read more »
Range-wide population genomics of common seadragons shows secondary contact over a former barrier and insights on illegal capture - BMC BiologyBackground Common seadragons (Phyllopteryx taeniolatus, Syngnathidae) are an emblem of the diverse endemic fauna of Australia’s southern rocky reefs, the newly recognized “Great Southern Reef.” A lack of assessments spanning this global biodiversity hotspot in its entirety is currently hampering an understanding of the factors that have contributed to its diversity. The common seadragon has a wide range across Australia's entire temperate south and includes a geogenetic break over a former land bridge, which has called its status as a single species into question. As a popular aquarium display that sells for high prices, common seadragons are also vulnerable to illegal capture. Results Here, we provide range-wide nuclear sequences (986 variable Ultraconserved Elements) for 198 individuals and mitochondrial genomes for 140 individuals to assess species status, identify genetic units and their diversity, and trace the source of two poached individuals. Using published data of the other two seadragon species, we found that lineages of common seadragons have diverged relatively recently (| 0.63 Ma). Within common seadragons, we found pronounced genetic structure, falling into three major groups in the western, central, and eastern parts of the range. While populations across the Bassian Isthmus were divergent, there is also evidence for secondary contact since the passage opened. We found a strong cline of genetic diversity from the range center tapering symmetrically towards the range peripheries. Based on their genetic similarities, the poached individuals were inferred to have originated from around Albany in southwestern Australia. Conclusions We conclude that common seadragons constitute a single species with strong geographic structure but coherence through gene flow. The low genetic diversity on the east and west coasts is concerning given that these areas are projected to face fast climate change. Our results suggest that in addition to their life history, geolo
Read more »