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Zena Hadjivasiliou@zenahadjivasiliou.bsky.social · last mo.

Such fun collab with the @vjesticalab.bsky.social @unil.bsky.social, revisiting the first question I became obsessed with as a PhD student: why do cells that fuse during sex need to differ genetically even when they look the same? 🙌 Celso Martin and Harry Booth for beautiful experiments+theory work

The Francis Crick Institute@crick.ac.uk · last mo.

Scientists have combined theory and experiments to show that genetic differences in seemingly identical yeast sex cells evolved due to competing demands during the asexual and sexual phases of their life cycle. https://bit.ly/3Tf7Uty

@vjesticalab.bsky.social · last mo.

And finally thank you @crick.ac.uk for the beautiful summary of our work and the wonderful @zenahadjivasiliou.bsky.social who made this into an awesome collaboration! www.crick.ac.uk/news/2026-07...

The evolutionary pressure behind sexual asymmetry

A major transition in evolution is the shift from asexual to sexual reproduction in early organisms. But why would a yeast cell, which usually reproduces asexually, choose to mate with a very differen...

crick.ac.uk

@vjesticalab.bsky.social · last mo.

Why did the two gametes (egg♀️ and sperm♂️) start to become different? It's a strategy to optimize the costs and benefits of investing into offspring! Read our brand new @pnas.org story that finds a molecular mechanism behind this evolutionary idea proposed in 1972 by Parker, Bell and Smith.

Meiotic cohesin Rec8 imposes fitness costs on fission yeast gametes favoring the evolution of parental bias in gene expression | PNAS

Differences between partner gametes, which evolved repeatedly in eukaryotes, can contribute to the evolution of the sexes, sexual selection, and no...

doi.org

@fbm-unil.bsky.social · last mo.

💡 Pourquoi, chez la plupart des êtres vivants, les deux partenaires sexuels ne contribuent pas de la même manière: l’un investit beaucoup (comme l’ovule), l’autre beaucoup moins (comme le spermatozoïde)? Des réponses dans cette nouvelle étude @vjesticalab.bsky.social 👉 www.unil.ch/news/1782827...

Se reproduire à ses risques et périls

Tous les organismes à sexes séparés descendent d’ancêtres dont les gamètes étaient similaires. Quelque chose a provoqué leur divergence vers des formes très différentes. Dans une publication parue dan...

unil.ch