what's the genetic basis of porcelain?

But a spangled bird is quite different from a mottled one, so other genes would have to be present on top of the mottling.
 
what is the difference between spangled and mottled? Wait, isn't spangled just a black tip on a self colored feather, and mille is self/black/white tipped feathers?
 
Here are examples spangled birds

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And mottled...

IMG_3151.jpg


IMG_3218.jpg
 
Quote:
the gene for mottling/spangling is the same gene. they affect other genes in different ways. the mottled gene adds a white tip with black seperating it from the base color. on a bb red it becomes spangled. on wheaton it becomes a spangled wheaton. on a black it becomes mottled, on blue it becomes blue mottled. spangled wheaton hens look similar to a millie fluer hen.

Quote:
columbian is a gene, wheaton is an allele. the columbian gene modifies whatever allele it is found over, thus columbian over wheaton begets buff columbian.
 

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