On the Basis of (Fish) Sex  

by Emily Goeringfigures by Andrea Luviano Did you know that sea lampreys are more likely to grow into males if they aren’t fed enough food? Or that one type of shrimp produces male offspring in the long days of summer, but females in shorter fall days? Sexual determination systems are the methods by which organisms produce offspring with differing biological sexes. Although all vertebrates evolved … Continue reading On the Basis of (Fish) Sex  

“I’m XY and I Know It”: Sex Determination Systems 101

by Katherine J. Wu figures by Daniel Utter Let’s talk about sex. Seriously. Not intercourse, though – more about how genetic sex is programmed during development. Sexual identity has been in the news often lately, and unsurprisingly so: the past few years have yielded sweeping reforms in civil rights, spurring new conflicts surrounding everything from age-old battles in gender equality to legislation enforcing anti-transgender bathrooms. … Continue reading “I’m XY and I Know It”: Sex Determination Systems 101