Speaking of research....You should do some on the granite. If you are going to be firm in your answers make sure they are educated.
Mike, Funny how you make a comment like this after posting this:
If it has a homozygous form it is a codom, therefor the homozygous form would be a super
you need to brush up on your genetics.

Now to clarify this:
I can think of three dominate traits off the top off my head. Spider,Pinstripe,and Granite. None of which have proven to have a homozygous form . Yet alone a homozygous that is lethal.
I you read closely I said DOMINATE traits. There seems to be two types of "granite".
Dominate, which to my knowledge have not proven to have a homozygous form. If you know of a line of DOMINATE granite that has proven to have a homozygous form, please share.
Then there are CO-DOMINATE (Incomplete Dominate) Granites in which there have been proven homozygous forms (super).
You will have to understand the difference between Dominate and Co-Dominate(Incomplete Dominate) .

FYI I have done a fair amount of research on "granites". I am actually working on my own "granite" project.