Your waiting has been rewarded! I apologize for the amount of time it took me to get this up and running. Blame grad studies and a new job with a wildly fluctuating schedule (I know that’s what I’m doing). With thanks to Guppie for his undying patience in trying to pummel the intricacies of tricolour genetics into my brain on more than one occasion, I humbly present a new section on Mouse Genetics: Genetic Oddities!! If I’ve missed out any interesting and quirky things, please let me know, and as always, pictures are welcome.