Tagged with Xenopus

Use it or lose it

Use it or lose it

Female frogs (Xenopus laevis) release their eggs out into the water, where they wait for some lucky sperm to come along and fertilize them. But they don’t wait very long. Frog eggs are ticking time bombs that self-destruct after only a few hours if not fertilized. Previously, how this happened was a mystery. Now, new … Continue reading

Correction–Frog sex!

Correction–Frog sex!

In my last post I stated that because frogs(Xenopus laevis) have external fertilization, there would be no frog sex pictures. Well, I was wrong! These frogs do, in fact, “mate”, but not in the way you’re used to thinking about it. Instead of penetrating the female to inseminate her, the male instead grasps the female from behind with “nuptial pads” … Continue reading

Egg jelly kicks sperm into gear in frogs

Egg jelly kicks sperm into gear in frogs

Sorry, but there won’t be any pictures of frogs having sex in this post. Why not? Because frogs (Xenopus laevis) are external fertilizers; the females lay their eggs in a pond, and then the males release sperm out into the open water. In just plain pond water, frog sperm will slow down within minutes. This is a … Continue reading