Here is a link that has a picture of a cockerel and a puller out of a R.I. Red Rooster over a Light Sussex Hen
Not My Birds---
http://www.practicalpoultry.co.uk/cgi-bin/yabb2/YaBB.pl?num=1212758838/0
Chris
I would like to also add that I also believe that a Dominant white gene (I) bird would have had to be added to "cover up" the Black in the Columbian pattern has.
Both the light Sussex and the R.I. Red are a Columbian pattern. The R.I. Red just has Red where the White would be in a "Silver"...
I'm just going to throw this in also.
Information from Exhibition Poultry Keeping by David Scrivener 2005
White plumage can be caused by three genes:
S, c and I. S is the sex-linked gene silver, as seen on Light Sussex.
The opposite gene to it is gold (s). This gene only changes the "red" or...