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Look up the Replication Crisis. The results of the majority of studies out there cannot be replicated-

This is a very obvious point that everyone else, including myself, missed. My RJF hens have barely any comb at all. You're probably correct that large combs are merely sexual selection from females If they were genuinely needed in India for heat discharge then hens would have them also. So...

Thank you for these images. There's obviously greater surface area and heat discharge in the single comb, but does it actually impact function at all? I've seen zero issues in Florida with Cubalaya, Ameraucana and Brahma pea combs

Laying eggs in winter in a cold climate doesn't sound like an evolutionary advantage to me. That's good for humans but terrible in terms of survival for chickens, given the wasted calories expended on dead eggs

I would never expect an amputated organ to function as well as a natural and healthy one. Your other points are insightful though

I thought pea combs were dominant. I had an Ameraucana breed a bunch of my single combed hens around here and every single one of his offspring inherited pea combs Maybe these are the "modified pea" you mentioned

The code was already there inside of the bird. Rhode Island Reds didn't magically get their red color, they got it from Malay ancestors and then a man specifically bred for that color he found in the Malay DNA Pea combs are too useful and widespread to be an accident from inbreeding distorting...

There's nothing in nature that occurs as an accident. The pea comb came from somewhere and it served a specific genetic purpose wherever it originated Your theory about an unknown junglefowl ancestor (in southeast Asia?) is probably correct I have some very fat Brahma X Orpington here and I've...

Pea combed breeds live perfectly in many different places though, including many very hot places. Clearly heat alone is irrelevant. Perhaps humidity is the missing factor here

Are there any genetic advantages to having a single comb over a pea comb? Single gets complaints of frostbite in the far north, yet pea seems to be universally fine from Alaska, to Brazil to the Philippines Single combs are also removed by cockfighters because they present a physical liability...