I’m not sure of the right terminology, the genetics gurus will know, but a pea comb gene is either incomplete dominant or partially dominant. It’s something like the blue feather gene where two copies of that gene gives you splash, one copy blue, and zero copies black feathers. With the pea comb gene two copies give you a pure pea, one copy gives you what I call a wonky pea, and zero gives you a single comb. But if the pea comb is mixed with the rose comb you get a cushion or walnut comb. Then there are a lot of modifiers that may give you a vee comb, buttercup comb, tall or short, floppy or stiff, big or small. The basics of comb genetics are really pretty simple, but with all those potential modifiers it quickly becomes a mess.
I can’t tell by looking what that comb is. It could easily be a wonky Pea, some variety of cushion or walnut, or maybe some other modifier is really messing it up. Interesting looking though, isn’t it. It does look like it has some pea in it.
Kelsie got it exactly right. The blue egg gene and the pea comb gene are so close together on the chromosome they usually travel together. But the more opportunities they have had to split the more likely they have. Another possible complication is that not all pea combed chickens lay colored eggs. If you happened to have another breed in the ancestry that was pea combed, all that is out of the window.
Another factor is that your rooster looks like he is a mix. It is likely, though not assured, he has one blue egg gene and one white egg gene. Which of those genes he gives to his offspring is purely random. Some may get the blue, others will get the white. Green and brown is just brown on top of blue or white. If he is split with one blue and one white and you mate him to a hen that does not have the blue gene, then about half the pullets should lay colored eggs and half not colored. But that I just the odds. Last year I hatched 8 pullets out of green eggs so 4 should have laid colored eggs with that rooster. Only one did and she has a pure single comb, no pea at all. But the next hatch I got 7 pullets and six laid greed eggs. All 6 had a wonky pea. This stuff does not come with guarantees.
There is really no genetic link between ear lobe color and egg shell color. Through selective breeding most white egg layers have white ear lobes and most brown egg layers have red ear lobes, but if you go through Henderson’s breed Chart you can find several exceptions. When you start mixing them none of that matters. I’ve had mixed breed brown egg layers with white ear lobes and have no idea where that white came from. They were descended from brown egg laying hatchery chickens with red ear lobes. Chicken genetics are fascinating but man are they a mess.
It sounds to me that you need to hatch some eggs and see what happens. Have fun with it.
