okay so can someone confirm for me that I have this right. If I put my opaline spangle HEN to a normal COCK who is NOT split for opaline then the chicks will be either spangle or normal and hens will not be carrying an opaline gene at all and cocks will be split for opaline, is that right?

 

I want to breed my spangle opaline hen soon but I want to get rid of the opaline in the chicks so I would be best to hold on to hens from that pairing and cull cocks as they will carry the opaline as a hidden split?

yes

You got it MB.

Far out - Your good

I studied genetics at uni Neat, that is the only reason I can actually understand all this stuff. Simple genetics like this is about the best I can do though, my mind boggles at the stuff sailorwolf can do breaking it down to tiny percentages, that's WAY beyond me...

I wouldn’t let it worry you MB, I think it’s pretty academic anyway. As it only works out over very large numbers of chicks. It’s suffices me enough to know what you have the possibilities of getting from a particular mating…even with Recessive Mutations you can get three in a batch when it’s supposed to be 25% or even less & then you may never get another of that Mutation again, as we never breed such large numbers from a single pair.