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Trace Method

All articles tagged with #trace method

science1 month ago•50 min saved

Two Ghost Ancestors Leave DNA Footprints in Modern Humans

Researchers using TRACE analyzed more than 500 modern human genomes from Africa, Europe, and Asia and uncovered traces of two previously unknown ancestral lineages. One lineage interbred with humans in Africa more than 50,000 years ago and now accounts for about 0.5% to 1% of modern DNA, while an older 'super-archaic' lineage dates back roughly 1.8 million years, with no DNA recovered. These ghost lineages help explain how humans adapted to different environments and why certain diseases affect specific populations, with current DNA providing the closest evidence of these long-lost ancestors.

via Ground News|

#african-interbreeding #ancient-dna #ghost-lineages

science1 month ago•205 min saved

DNA Reveals Two Hidden Ancestors In Modern Humans

A new computer-based approach called TRACE scanned genomes from 500 modern humans to reconstruct deep genealogies and uncovered two mysterious ancestral lineages: a relatively recent African ghost lineage that interbred with Homo sapiens in Africa over 50,000 years ago, contributing about 0.5%–1% of today’s DNA; and a much older “super-archaic” lineage that split around 1.8 million years ago and later entered the human gene pool through Denisovans in Eurasia, leaving traces in some modern genomes and showing that our ancestry includes hidden branches still influencing us today.

via CNN|

#africa #denisovans #ghost-lineages

science2 months ago•11 min saved

Humans Carry About 1% DNA From a Mystery Ancient Lineage

A TRACE-based analysis of 503 genomes found about 0.5–1.1% of human DNA from a mysterious, unsequenced archaic lineage—present across populations including Africans and Oceanians—suggesting ancient interbreeding beyond Neanderthals and Denisovans, though the exact identity of this ghost lineage remains unknown.

via ZME Science|

#ancestral-recombination-graphs #denisovans #ghost-ancestry