The Y chromosome isn't going extinct after all

A few years back, we learned that the Y chromosome was essentially rotting, shedding hundreds of its genes over the last 300 million years. That isn't wrong, but it turns out reports of the Y chromosome's eventual extinction were premature. » 2/22/12 11:29am 2/22/12 11:29am

The bizarre toad that's part clone, part lover, and all hybrid

Reproductive arrangements don't get much stranger than those of the Batura toad of Pakistan. The entire species is the result of two unknown species interbreeding, and each toad carries three sets of genes...which makes passing on its genome extremely tricky. » 10/16/11 2:30pm 10/16/11 2:30pm

How a handful of tiny RNA gives women better immune systems

There's a longstanding belief that, on average, women are healthier than men, and with good reason. Women live longer, and studies reveal women fight off disease better than their male counterparts. But where does this advantage come from? Turns out it's all thanks to some microRNA on the X-chromosome. » 9/28/11 7:40am 9/28/11 7:40am

Lizard genome sequence solves a human genetic mystery

320 million years ago, mammals and reptiles reached an evolutionary parting of the ways. We've now sequenced a lizard genome for the first time ever, and it's vastly different from our own...but in a few crucial ways, it's shockingly similar. » 8/31/11 4:26pm 8/31/11 4:26pm

Thin people have the fattest genes

There are tons of genetic reasons why people are obese - after all, it's important that we eat, and we didn't evolve to live in a world of plentiful food. But why would anyone be genetically predisposed to extreme thinness? » 8/31/11 2:01pm 8/31/11 2:01pm

Plants survive animal attacks by creating lots of new DNA

Most of us wouldn't welcome getting partially eaten by a wild animal — but it could be the best thing that can happen to a plant. » 8/01/11 11:00am 8/01/11 11:00am

Confirmed: All non-African people are part Neanderthal

The evidence has been mounting for years that early humans and Neanderthals interbred, but now it's pretty much a certainty. Part of the X chromosome found in people from outside Africa originally comes from our Neanderthal cousins. » 7/18/11 4:00pm 7/18/11 4:00pm