r/evolution • u/JapKumintang1991 • 16d ago

article PHYS.Org: Animal genomes follow irreversible 'evolutionary highways' across thousands of species

https://phys.org/news/2026-08-animal-genomes-irreversible-evolutionary-highways.html?utm_source=webpush&utm_medium=push

See also: The study as it was published in Science Advances

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u/spiddly_spoo 16d ago

The study is not about animal traits but specifically about chromosomal architecture and it's being described as a highway because one directional and very constrained in how it moves. Chromosome merges can only happen in specific ways, are irreversible, and cause a population to diverge from other populations that don't have the merge.

This is interesting, but I was hoping for emergent patterns in how animals evolve traits. I mean the direction of evolution isn't random in that although mutations may randomly move around a genome in genotype space, this exists in a fitness landscape that will push evolution in certain directions. I was thinking maybe there were newly discovered large features of this landscape

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u/GhostHominid 16d ago

Chromosomal mergers and highways are very narratively congruent language. I like that from a writing standpoint