I'm amazed at how knowledgeable many of the folks on here are. I'm guessing many of you guys are self trained/hobbyists? I'm actually a chemist by training. Not a dummy--but a complete dummy with genetics! I've been reading and reading on the web about breeding, sex links... and it seems even less clear now than when I started (that's how chemistry went too--it takes a lot of knowledge to understand how little you actually know ) I found this page on some sex linkages, but have some further questions. for example, a cross like a RIR x light Sussex would produce offspring with the black stripped away, leaving the red. Would a similar thing work with another black bird, like maybe a BC Marans? And in the wyandotte crosses--you would basically strip away black by crossing it with a silver bird, like the sussex again? What about adding colors and markings back in? Say the RIRxSS, crossed again with a speckled sussex... Too many questions to ask here. And after 12 years of college, where every problem starts with "hmm, I'd better read...." what are good references? It's a fascinating subject, and even with solid genetic knowledge, it can be a messy, partly luck/chance driven thing. Cool stuff, no doubt about it. I'm hoping to do a little hack-genetics project, using good layers, crossed into dark egg layers, and everything as cold hardy as possible. Initially I thought to not worry about it. A RIRxBR should be the same deal as a BRxRIR, shouldn't it? Err--no. Not even close! There is a potential to do some really cool stuff--like the Aloha Chicken project. I'd love to do something similar, but for Wisconsin, rather than Arizona. it.