Just to be clear, Lyles birds are called "Auburn" because they are a combination of genes working together to create the pattern he wants to produce. The genetic term for this color is referred to as "gold" or s+.
A very dear friend explained it to me this way...
"Silver & gold are alternatives. All birds have to have a pair of these genes (there are, also, the rarer albino alleles). Even black birds & white birds still have to have two genes of one allele or two genes of different alleles; it just doesn't show up, but it is still there. S is the symbol for 'silver', s+ is the symbol for 'gold'. S is the dominant gene. s+ is the recessive gene. Even in a bird where gold or silver are not showing, the males will have one of the following gene pairs. S/S = silver bird, S/s+ & s+/S = silver bird with gold tint, s+/s+ = gold bird. when bred together each offspring inherits one gene from each parent. There is no combination where a bird can inherit a silver gene from a gold parent."
A very dear friend explained it to me this way...
"Silver & gold are alternatives. All birds have to have a pair of these genes (there are, also, the rarer albino alleles). Even black birds & white birds still have to have two genes of one allele or two genes of different alleles; it just doesn't show up, but it is still there. S is the symbol for 'silver', s+ is the symbol for 'gold'. S is the dominant gene. s+ is the recessive gene. Even in a bird where gold or silver are not showing, the males will have one of the following gene pairs. S/S = silver bird, S/s+ & s+/S = silver bird with gold tint, s+/s+ = gold bird. when bred together each offspring inherits one gene from each parent. There is no combination where a bird can inherit a silver gene from a gold parent."
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