Originally Posted by The NY Gecko

reptiles are different than mammals so idk how that works but ill try and rationalize it. If you have a black mouse and a white mouse and both traits are co-dom then all of their offspring will be grey. however if you breed 2 grey mice to each other the ratio will be 1:2:1 1-black 2-grey 1-white. Thats how the co doms work, odd i know. You can do it on a punnett square and it will show you the same thing. but i guess it doesnt explain the huge stroke of bad luck you seem to be having. it seems to be just that, bad luck.