Profile

Cover photo
Ethio Helix
211 followers|355,044 views
AboutPosts

Stream

Ethio Helix

Shared publicly  - 
 
Find below relative frequencies for Sudanese MTDNA from a thesis entitled "Genetic Patterns of Y-chromosome and Mitochondrial DNA Variation, with Implications to the Peopling  of the Sudan", the entire thesis can be downloade...
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
A new paper attempting to decipher the out of Africa exit route by focusing on Ethiopian and Egyptian autosomal genetics was published a couple of weeks ago. Putting aside the 'hocus pocus' autosomal analysis for a moment, I ...
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
Abstract
Paleoanthropologists have long argued that environmental pressures played a key role in human evolution. However, our understanding of how these pressures mediated the behavioral and biological diversity of early modern humans and their migration patterns within and out of Africa is limited by a lack of archaeological evidence associated with detailed paleoenvironmental data. Here, we present the first stable isotopic data from paleosols and fauna associated with Middle Stone Age (MSA) sites in East Africa. Late Pleistocene (∼100-45 ka, thousands of years ago) sediments on Rusinga and Mfangano Islands in eastern Lake Victoria (Kenya) preserve a taxonomically diverse, non-analog faunal community associated with MSA artifacts. We analyzed the stable carbon and oxygen isotope composition of paleosol carbonate and organic matter and fossil mammalian tooth enamel, including the first analyses for several extinct bovids such as Rusingoryx atopocranion, Damaliscus hypsodon, and an unnamed impala species. Both paleosol carbonate and organic matter data suggest that local habitats associated with human activities were primarily riverine woodland ecosystems. However, mammalian tooth enamel data indicate that most large-bodied mammals consumed a predominantly C4 diet, suggesting an extensive C4 grassland surrounding these riverine woodlands in the region at the time. These data are consistent with other lines of paleoenvironmental evidence that imply a substantially reduced Lake Victoria at this time, and demonstrate that C4 grasslands were significantly expanded into equatorial Africa compared with their present distribution, which could have facilitated dispersal of human populations and other biotic communities. Our results indicate that early populations of Homo sapiens from the Lake Victoria region exploited locally wooded and well-watered habitats within a larger grassland ecosystem.
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
New NGS study of the Y DNA
A new Y-DNA study has appeared using Next Generation Sequencing, where ~9 Mb of the Y Chromosome was sequenced for 456 samples (299 of which were new) some preliminary observations are outlined below: (1) Mutation Rate: This is the second published study to...
A new Y-DNA study has appeared using Next Generation Sequencing, where ~9 Mb of the Y Chromosome was sequenced for 456 samples (299 of which were new) some preliminary observations are outlined below: (1) Mutation Rate: Thi...
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
An Israeli anthropologist, Israel Hershkovitz, claims that he and his team have found the archaeological smoking gun for the Out of Africa theory, a theory which has been genetically reinforced for the past couple of decades,...
1
Add a comment...
Have him in circles
211 people
Jeff Lewis's profile photo
Wiley-VCH Verlag's profile photo
World of Chemicals's profile photo
BioCurious's profile photo
mkonen gzchew's profile photo
Dr. Micheal Global Warming Journalist's profile photo
nguyễn anh's profile photo
Belay Tarekegn's profile photo
Jean-Philippe Gourdine's profile photo

Ethio Helix

Shared publicly  - 
 
Improved resolution of E-M215 (aka E3b / E1b1b)
A new paper has appeared with a a focus on Haplogroup E, and mostly focused on E-M215 and E-M35, with a moderate level of improvement in resolution from what we used to know . Basically, at first glance, the major novelty with respect to E-M215 is that all ...
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
Sudan MTDNA
Find below relative frequencies for Sudanese MTDNA from a thesis entitled "Genetic Patterns of Y-chromosome and Mitochondrial DNA Variation, with Implications to the Peopling  of the Sudan", the entire thesis can be downloaded from here . The thesis also in...
Find below relative frequencies for Sudanese MTDNA from a thesis entitled "Genetic Patterns of Y-chromosome and Mitochondrial DNA Variation, with Implications to the Peopling  of the Sudan", the entire thesis can be downloade...
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
Exploring population size changes using SNP frequency spectra
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
The solely STR based Y TMRCA calculator now also can accept SNP based input to compute the TMRCA of a node. Instructions and methodology can be found within the app at the link below: https://ehelix.pythonanywhere.com/init/de...
1
Add a comment...

Ethio Helix

Shared publicly  - 
 
A comparison of worldwide phonemic and genetic variation in human populations Abstract Worldwide patterns of genetic variation are driven by human demographic history. Here, we test whether this demographic history has left...
1
Add a comment...
People
Have him in circles
211 people
Jeff Lewis's profile photo
Wiley-VCH Verlag's profile photo
World of Chemicals's profile photo
BioCurious's profile photo
mkonen gzchew's profile photo
Dr. Micheal Global Warming Journalist's profile photo
nguyễn anh's profile photo
Belay Tarekegn's profile photo
Jean-Philippe Gourdine's profile photo
Basic Information
Gender
Male
Story
Tagline
Population genetics focusing on Africa and Ethiopia.
Introduction
Population genetics focusing on Africa and Ethiopia.
Links
Other profiles
Contributor to