Green Queens are also Salmon Faverolle based Easter Eggers. Technically EE X Faverolle X EE.From the looks of it, he looks like a production type Red cockerel, Green Queen sold by hatcheries are basically another name for Easter Egger wich are mostly bearded and with a pea comb.
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Brown genetics is a polygenic trait, I beleive that at least 10 genes are responsible.
Here is the Chart you are looking for.
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