Quote Originally Posted by Freakie_frog View Post
So help me out here Pastel's are Hets also only needing one copy of the gene to be expressed. The homozygous form of the mutation is a super pastel correct or a visual difference between the two.
A pastel is an incomplete dominant. When an animal carries one copy, it is only showing a partial expression of the gene.

Now you breed any two animals together say pastel for example you get a 1:4 shot at producing a homozygous pastel. Now lets look for a moment at spiders you breed two spiders together and does each parent still pass half of its genetic material on to the offspring?
Yes, the inheritance is still the same. Each animal is going to give one of the copies of it's gene. It could be the normal gene it gives, or the pastel gene.


If so then 1:4 animals will be Homozygous. Now where is it written that the Homozygous form of a mutation must look different that the Het. If the mutation only effect the scales to a certain extent or the super is so subtle we can't tell the difference from the Het form how would you know.
Exactly my point. So far as we know it, the spider gene is a dominant in that only one copy of the gene is needed for the FULL expression of the phenotype. So a het spider would look exactly the same as a homozygous spider.

No one has come forward about their homozygous spider as of yet, so it is still very possible it is homozygous lethal.

Like I said, BHB believes he has a homozygous pin, because when bred to normals, he gets all pins.