dominant genes

[John Sawicki]

With regard to dominance and recessiveness, it is important to remember 
that one gene is not neccessarily dominant to another.  In fact, the 
terms dominance and recessiveness are poor.  For example, In considering 
two structural genes, one "dominant" and the other "recessive" for the 
same trait, both might be expressed, it might be that one of the products 
that is made, is faulty, or is made in less concentration, not 
neccessarily that it is not made at all.  Dominance is just what you see 
in the heterozygote.