Questions in regards to gentics

[tncorns]

Is all corn snake morphs recessive genes or are there any known co-dom morphs. I know the okeetee is a line bred trait. But can't think of any other morph that isn't a recessive gene..

 

[alan]

Isn't the diffused gene like that?

 

[TripleMoonsExotic]

Okeetee, Candycane, Reverse Okeetee, Miami, Crimson, Patternless, Cubed are selectively bred...
Creamsicle, Rootbeer, Cinnamon, Jungle are hybrids...

Their are a ton more to add to the above, the Cornsnake Morph Guide would be a good start to learning about them.

Their are no known Co-Dominant mutations that I am aware of. Things like Diffused, Caramel and Sunkissed have been suggested to be "variable" dominant as they can (but not always) be expressed in het form.

 

[alan]

Yeah, that's what I meant, bloodred is "variably codominant".......

 

[TripleMoonsExotic]

Dominant: one of a pair of alternative alleles that masks the effect of the other when both are present in the same cell or organism.

Codominant: pertaining to two different alleles that are fully expressed in a heterozygous individual. Red + White = Red & White

Incomplete Dominant: a type of inheritance in which both alleles for a specific trait are expressed which results in a combined phenotype. Red + White = Pink

 

[Blue Apple Herps]

Correct, so far there are no dominant or codominant cornsnake genes. Diffused/bloodred can somewhat act in a codominant manner, but I wouldn't call it that. I'd still label it recessive.

 

[TripleMoonsExotic]

Another one to consider that isn't just simple recessive is Ultra...

Ultra is recessive, but is also allelic to Amel (they sit on the same locus). So what that means is when one copy of Ultra and one copy of Amel are present, the resulting animal is a mixture of the two.

 

[ForkedTung]

I believe that there is speculation that the new gene Tessera, may be a co-dom, if I remember correctly?

 

[Blue Apple Herps]

Another one to consider that isn't just simple recessive is Ultra...

But it still is simple recessive...

It's codominant to amel, but you still need two mutated copies of that locus for a phenotype. Much in the same way motley/stripe are.

 

[TripleMoonsExotic]

Yes, I'm aware of that (good catch with Motley & Stripe though - forgot about that one!). I said Ultra wasn't just simple recessive.

I was also under the understanding that it wasn't codominant since it doesn't fit the definition of codominant and allelic was the proper term?

 

[Blue Apple Herps]

Yes, I'm aware of that (good catch with Motley & Stripe though - forgot about that one!). I said Ultra wasn't just simple recessive.

I think its a little bit of semantics. If you're talking about just ultra, then it acts completely recessive. If you're talking about just amel, it acts completely recessive, if you throw in the two, its still recessive, but a little more complex...

I was also under the understanding that it wasn't codominant since it doesn't fit the definition of codominant and allelic was the proper term?

You're probably right. They are allelic to each other, so I'm not sure if codominant to each other is also an appropriate term (been quite a while since I had genetics in college!!)