Reptile & Amphibian Forums

I'm trying to figure out genetics for bulls. Which are recessive genes, and which are dominant? Also which are combinations of traits?

I'm guessing as such:

whitesided = ww (recessive)
albino/amel = aa (recessive)
Normal = NN (dominant)
Ghost = ? = recessive
Snow = ? = recessive
Axanthic = ? = recessive

I'm probably wrong, so correct me, please!

-cat
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My collection and herp photography

www.lowergroundreptiles.net

I'm pretty sure that snow is a combination of effects from two mutant genes. I haven't been able to make much progress either.

I've got a cat that is black and has 6 toes on each front foot. Normal is mackeral tabby, 5 toes on each front foot, two eyes, fur, color from midback to toetips, etc., etc. Black is recessive to normal, and polydactyly is dominant to normal. So is normal dominant or recessive?

Normal is not symbolized N or NN. It's best to use wild type or normal as the standard of comparison and say that normal is neither dominant nor recessive. Mutant genes are dominant or recessive in comparison to the standard (normal).

Normal genotype in bulls is AA WW ... with normal genes for another 30,000 or so loci. For convenience, we ignore the loci that are normal, but we should not forget that they are still there in the living animal.

Paul Hollander

>>I'm pretty sure that snow is a combination of effects from two mutant genes. I haven't been able to make much progress either.
>>
>>I've got a cat that is black and has 6 toes on each front foot. Normal is mackeral tabby, 5 toes on each front foot, two eyes, fur, color from midback to toetips, etc., etc. Black is recessive to normal, and polydactyly is dominant to normal. So is normal dominant or recessive?
>>
>>Normal is not symbolized N or NN. It's best to use wild type or normal as the standard of comparison and say that normal is neither dominant nor recessive. Mutant genes are dominant or recessive in comparison to the standard (normal).
>>
>>Normal genotype in bulls is AA WW ... with normal genes for another 30,000 or so loci. For convenience, we ignore the loci that are normal, but we should not forget that they are still there in the living animal.
>>
>>Paul Hollander

Ah, ok. I was just using capitol letters that I could remember as dominant, and lowercase as recessive. By normal, I meant wild-type. Should have clarified that.

Now I think ghost = whitesided x hypo, and snow = whitesided x amel, or am I wrong there? Is whitesided a trait that is singular, or is it a combo of two other traits? How about axanthic/anerythristic (not sure if those two are different) - would they be considered a singular trait, or a combo?

-cat
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My collection and herp photography

www.lowergroundreptiles.net

As far as I know in Bull Snakes all color morph traits are simple recessive in cluding whitesided in it self .
Most people are calling Snow's ,albino whiteside now and Ghost , hypo whitesided now .
I hope I was able to help answer your questions.

Jason

>>As far as I know in Bull Snakes all color morph traits are simple recessive in cluding whitesided in it self .
>>Most people are calling Snow's ,albino whiteside now and Ghost , hypo whitesided now .
>>I hope I was able to help answer your questions.
>>
>>Jason

Its much easier to learn with "albino whitesided" and "hypo whitesided" than it is with other terms like ghost and snow that have been used with other snake species in completely different genetics. IE: a snow in corn snakes is an albino anery, and ghost are typically hypo aneries, but have been proven to be different before.

-cat
-----
My collection and herp photography

www.lowergroundreptiles.net