Rose comb, pea comb, walnut combs are all dominate mutations of the recessive single comb genes.Not trying to disagree, just trying to understand, but from my understanding, if two straight comb chickens have off spring, there would be no other possible genotypes to express a different variety of comb, but if a pea comb and a single comb mated, if the pea comb had the recessive gene, they could either produce a single comb or a pea comb chicken.
Also from my understanding, if a chicken with a pea comb and chicken with a rose comb (the comb type of my rooster) have offspring, they could produce a walnut comb, a rose comb, or a pea comb. The three other chicks all had EE moms with pea combs, and the buff of course is a pea comb. So far all chicks have a pea comb except one, and it either has a walnut or a rose comb, but it's still too small to tell exactly.
Again, that's just been my understanding of things. Chicken genetics have been very confusing and I'm going off of my ancient knowledge of genes from high school...
Also your rooster (is he a roo?) is beautiful and the comb is so unique!!
It would make sense if one of the ancestors of your single combed breeds had a pea comb, or some other comb type that you don't see yourself.
For example, Red JungleFowl hybrid X Silkie produced a single combed bird.
For example.
If I were to breed her to another single combed bird, I'd get like 35% single combs, 25% rose combs, 25% pea combs, & 15% walnut combs.
It's fine, I know what you mean.
Yep, he's a rooster, & that's my sister holding him.