Tagged: genetic drift

What happened to the Neanderthals? - BioBlog

Alison Campbell Jun 12, 2019

One of the questions students often ask, when we’re discussing human evolution, is “what happened to the Neanderthals?” After all, this was a large-brained species closely related to our own, with some fairly complex tool technologies and the ability to survive (and thrive) in harsh environmental conditions. Yet they appear to have been replaced by anatomically-modern humans (in Europe, anyway) … Read More

Is it a shrimp? Is it a prawn? No – it’s Super Crayfish! - BioBlog

Alison Campbell Feb 12, 2018

Polyploidy – the duplication of chromosome sets – is relatively common in plants, and can result in the development of new species. (Many modern food crops are polyploids.) It’s much less common in animals, although found in some frogs and salamanders (amphibians) and leeches (annelids). So it was with a mix of excitement, surprise, and alarm that … Read More