ANALOGOUS SYSTEM. “The answer to this evolutionary puzzle may reside within the recent discovery of a remarkably similar β-catenin mediated binary specification mechanism in another animal phylum. During the asymmetric, spirally patterned embryonic cell divisions of the polychaete annelid Platynereis dumerilii, a well conserved β-catenin accumulates to high levels in all vegetal pole daughter nuclei, and to low levels in all animal pole daughter nuclei.”
https://lnkd.in/dAxynvD