Quote:
I have a problem with this particular example as it implies things that just are not so, and does not do a good job of explaining things. With different examples and better text it could be helpful.
However, it implies that there is a single white gene, and that it is recessive. Yes, there is a recessive white gene, but there is also a separate dominant white gene.
Even worse, the intermediary example is completely inaccurate. Yes, there are incompletely dominant genes which work in this manner, and co-dominant genes. But the example of black and white producing grey is incorrect. Splash or silver would be better choices for incomplete dominance. Rose & pea comb might be good choices for co-dominance, except with their combination you don't actually see a relationship to either rose or pea in a walnut comb--just as you don't see the flour and egg baked into a cake.
