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what does recessive white mean? I am clueless on the genetics.
I think it means that there are white feather genes in a parent, but if the other parent doesn't carry the gene than the chicks won't have it. For example, soft Silkie feathers are recessive, so if you cross a Silkie with a BR than it won't be a Barred Rock looking bird with the fuzzy Silkie feathers. On the other hand, the blue egg laying gene is dominant, so if you cross an Ameraucana with a BR than it will be a BR-ish looking bird that lays blue eggs (though it would be considered an EE, so most likely green eggs, no major difference, though). So, if one dam or sire has it the recessive white gene, the other does, too, for you to get White feathered chicks in that way. That's how I understand it, at least.
Thats correct.
The recessive White gene works just like Lav,Mottling, Silkie feathering, and any other simple recessive genes, it needs to copies to show it, So your Ameraucana roo would have likely been masking Black under his two copies of recessive white, and when bred to barred rock hens, you would get Black Sexlinked Easter Eggers. And wilth one of the parents being recessive white and the other not carrying the gene, then they will all be carrying one copy of recessive white. So if you were to breed them together or back to the father, you would get some more whites
