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And does the seperate Alleles mean that the offspring of a single comb and V comb could be bred to a sibling and breed true for that comb look?
Ok, I will try to explain this as best as I can.
Basically the expression of the single comb requires that every comb mutation alleles are in their wildtype form(+ sign) so they need to be p+/p+, r+/r+, v+/v+
So what happens if you breed a p+/p+, r+/r+, V/V with p+/p+, r+/r+, v+/v+? The offspring will be p+/p+, r+/r+, V/v+, if you bred those together 50% will be p+/p+, r+/r+, V/v+, 25% will be p+/p+, r+/r+, V/V and 25% will be p+/p+, r+/r+, v+/v+
Most people here are under the impression that p+ is the meaning of single comb, but that's just the wildtype form of the pea comb allele.
Another thing I would like to point out that thanks to the linkage of P-O and p+-O one can introduce the blue eggshell mutation to many breeds without altering their looks, for example there could be Blue egg laying Polish or Butter Cup, Blue egg laying Wyandottes(Darjones already working on them), Blue egg laying Rose Comb breeds etc..
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