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Professional Scientists of Lemmy: What is your field of study's, most complex unanswered question? (lemmy.world)

submitted 5 months ago by TehBamski@lemmy.world to c/asklemmy@lemmy.ml

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[–] bananabenana@lemmy.world 1 points 5 months ago

Three robust genetics papers using different sequences and genes, each time place it as a sister group to Archosauria:

248 nuclear genes (187,026 nucleotide sites): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3473239/

1145 ultraconserved elements (UCEs) and their variable flanking DNA: https://royalsocietypublishing.org/doi/10.1098/rsbl.2012.0331

1,113 single-copy coding genes, robustly indicated that turtles are likely to be a sister group of crocodilians and birds: https://www.nature.com/articles/ng.2615

This level of genetic evidence is an overwhelmingly strong signal, regarding relationships and recent common ancestry to extant species. I would say it is undeniably strong. You cannot possibly get evolutionary convergence over this many genetic loci.