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Surprisingly, it was discovered that about 30% of their genes have remained in the same arrangement since their divergence, exhibiting an unusual evolutionary pattern known as synteny.

"That homosporous lycophytes have retained so many duplicate genes and so much synteny is fascinating, a little bit surprising, and doesn't necessarily fit with our traditional ideas of how genomes reorganize themselves after a large-scale duplication," notes Wickell.

As animals evolve, bits and pieces of DNA get swapped around, but genes often stay on the same chromosome—a trend known as synteny.

Schultz’s team looked at examples of synteny in comb jellies, sponges, and some unicellular relatives.

In the three interspecific comparisons, the absence of synteny in the centromere-adjacent regions of the Ae. tauschii pseudomolecules is reflected by empty space in those regions.