I have noticed on this forum some individuals have a grasp concerning the phenotypic expression of the blue gene in chickens, but the genotypic understanding is sometimes lacking. I hope the following information will be helpful to any interested party.
First, some genetic information about...
Found this article.
http://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1002914
Makes sense because good egg laying leghorns have big floppy combs. So if you want to increase the egg production in your flock- choose and breed the hens and roosters with the largest combs...