- Jun 15, 2008
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I believe there is only one blue/green/etc gene. The different EE colors come from then crossing that gene with various brown to white shades. The blue is dominant so an EE hen that lays colored eggs crossed with a roo that has no gene will have 50-100% that lay colored eggs. The odds go up if the roo carries genes. If the hen or roo have 2 copies of the gene then you get 100% colored egg laying offspring. The randomness comes from the fact different shades of brown will produce different shades of green and pure white to cream will produce various degrees of blue and everything between blue and green. So depending what your roo and hen carry you may end up with an entirely different shade of egg from the offspring even though they carry the same gene for blue eggs.
I have japanese bantams that lay pink eggs. I also have ones that lay nearly pure white eggs and one that lays quite dark brown. Japs were not bred for egg color and carry a mix of genes so they produce from white to cream to pink to brown. I don't think the pink in EEs has anything to do with the blue gene but I could be wrong.
Purple is usually calcification. I've been getting purple spotted eggs lately. It doesn't wash off. While the egg is wet though the brown color underneath will show through so it temporarily does not look purple until it dries again.
I have japanese bantams that lay pink eggs. I also have ones that lay nearly pure white eggs and one that lays quite dark brown. Japs were not bred for egg color and carry a mix of genes so they produce from white to cream to pink to brown. I don't think the pink in EEs has anything to do with the blue gene but I could be wrong.
Purple is usually calcification. I've been getting purple spotted eggs lately. It doesn't wash off. While the egg is wet though the brown color underneath will show through so it temporarily does not look purple until it dries again.