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E/E or ER or ewh or eb .....

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Guest:
I\'ve been doing a little research into the genetics of color and have just realised (HA!) that not all blacks are created equal. Of course I should mention this is a problem for every breed. Down to my question, do any of you do cross mating to test your blacks to make sure they are E/E? What is the most useful cross as this is the domiant E-locus?

grisaboy:
Well they could be E or they could be E^R and possibly (but not likely) even e^b.  I don\'t think there is any requirement that they be one or the other as long as they meet the color standard.  I don\'t know of any advantage or disadvantage of being E or E^R in most matings, either would work. Someone else may know why one would be preferred over the other.
That said,  I think you can tell by the down color of the baby chicks.  At least my modern game chicks (Proven to be E^R) are usually solid black when hatched.  The black ameraucana chicks usually have a white belly.  I don\'t know for sure that these have E genes, but they sure look different than my moderns.

Curtis

Guest:
I think it only becomes important when crossing to work with other colors, and to understand more of what pops out/up occasionaly.
Do you get a brown head on your ER chicks? DO you have other colors, like Id, in your modern games?

John:

--- Quote ---Do you get a brown head on your ER chicks?
--- End quote ---

I know the question is for Curtis, but will give some input.  I don\'t get brown on the heads of my brown red chicks, but do on the black gold chicks.

--- Quote ---E^R) are usually solid black when hatched
--- End quote ---

I have photos of mine posted on the Photos page of the ABC site.  My bantam brown red chicks seem to have more white than the LF which hatch from mostly black to solid black.
I don\'t know for sure if they are E^R/E^R.

grisaboy:
I have modern game bantams in black, birchen and brown red.  All are genetically E^R.
All hatch out solid black, except occasionally the brown red chicks will have a brown face.  
All of my moderns have black or slate legs so Id is not an issue.
They are really pretty easy genetically as all I really have to worry about is gold (ss) versus silver (SS) when I cross brown reds and birchens.

Curtis

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