Super excited that this story by @borissieber.bsky.social is now on BioRxiv! For decades, we thought there was no MAPK scaffold for the ERK-like cascade that promotes sexual reproduction in fission yeast ... until Boris found it ! See the thread 👇 and enjoy the paper! doi.org/10.1101/2025...

Sex or growth? Life must continually balance these strategies. We forced yeast to choose and captured the trade-off in real time. Evolution rewired existing regulators and fixed them through genetic assimilation, creating specialists for sex at the cost of growth. www.biorxiv.org/cgi/content/...