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Book: Inheritance in Poultry p 74
" Ear Lobe Color"
Red is primitive in both groups. White is the new variation, which isprobably due to fat or other particles in the skin, and is consequently positive. Only in extreme cases is red wholly eliminated from the earlobe. In three series of crosses (V,VI, and X) of the red-lobed Dark Brahma and a white (and red)-lobed race the earlobe were prevailingly red, but had some white in their centers. Likewise, in two series of crosses (VII and VIII) of the red-lobed Cochin and the white-lobed Leghorn, red dominated in the hybrids, but did not always perfectly exclude white. Red is apparently dominant but very imperfectly so; some cases rather indicate particulate inheritance."
This book is old old old. Originally published in 1906. Author is Charles Benedict Davenport who was the director for experimental evolution, Cold Spring Harbor, New York.
It looks like Davenport crossed a LOT of very different chickens and tracked the results and documented the results of certain genetic traits. Book contains his methods, the genetic traits he was looking at in his crossings and tables of the results by head count.
The book can be gotten from Amazon for 14.99 or something...but it is in the public domain (more than 70 years old) and you can read it free on google books. It's considered culturally significant. How's that?
So going back to our previous question about earlobe color, I think he found that red is dominant...but would be an 'incomplete dominant'.
" Ear Lobe Color"
Red is primitive in both groups. White is the new variation, which isprobably due to fat or other particles in the skin, and is consequently positive. Only in extreme cases is red wholly eliminated from the earlobe. In three series of crosses (V,VI, and X) of the red-lobed Dark Brahma and a white (and red)-lobed race the earlobe were prevailingly red, but had some white in their centers. Likewise, in two series of crosses (VII and VIII) of the red-lobed Cochin and the white-lobed Leghorn, red dominated in the hybrids, but did not always perfectly exclude white. Red is apparently dominant but very imperfectly so; some cases rather indicate particulate inheritance."
This book is old old old. Originally published in 1906. Author is Charles Benedict Davenport who was the director for experimental evolution, Cold Spring Harbor, New York.
It looks like Davenport crossed a LOT of very different chickens and tracked the results and documented the results of certain genetic traits. Book contains his methods, the genetic traits he was looking at in his crossings and tables of the results by head count.
The book can be gotten from Amazon for 14.99 or something...but it is in the public domain (more than 70 years old) and you can read it free on google books. It's considered culturally significant. How's that?
So going back to our previous question about earlobe color, I think he found that red is dominant...but would be an 'incomplete dominant'.
