Friday, January 4, 2013
Recessive Red (the "e" influence)
Now to explain how the black works here. Because we established that red is only a coat colour (this is the expression of phaomelanin, not eumelanin) the skin, eyes, nose and eyerims are not changed. Thus, if our dog is "KK" "BB" "DD" - he will have black in all of these areas. (Hence our black-nosed Red Setter.) If our dog is genotypically "bb', for instance, he will have a chocolate coloured nose and skin, and red or cream/lighter body.
This colouration, a light, sandy coloured red is often called 'Fawn' (the true term for this shade of red) and is determined by the same influence which determines the colour of a dog's tanpoints if they express that pattern. Recessive reds do not express any form of agouti. (No sable, no tanpoints may be expressed. If they are, the dog is not recessive red, but rather, dominant red.)