Platypus Sex Chromosomes And Basal-Equals-Primitive
There has been considerable interest in the publication of the platypus genome, which is good. Unfortunately, much of the reporting has been distorted, which is bad. However, rather than picking on the press, I want to focus on an example from the scientific literature where a misconception about evolutionary relationships seems to creep in and generate confusion. Consider the following line, from a soon to be published paper about platypus sex chromosomes (Veyrunes et al. 2008).
As the most basal mammal group, the egg-laying monotremes are ideal for determining how the therian XY…