Peoples experience with Blue Headed Green/Olives Tokays

[tombo46]

Ello people. In my collection I have several BHG's and an Olive. I recently paired up my Olive to a normal and had successful breeding and hatching of 2 eggs so far. Both hatchlings are normals. I have heard different reports on what type of morph the olives etc are. Some people have said Dominant and some Co-dominant. I haven't however heard anyone say that it was simple recessive? If it is indeed genetic then I would have expected to have had Co-Dom Semi-visual offspring but to get normals makes me think mine may be a simple recessive trait?

So what experiences have you had with them?

 

[Riverside Reptiles]

If it's co-dom, 2 offspring isn't really a very good sampling to base from. Co-dom would mean that you have a 50/50 chance of hatching out a morphed individual. That's like tossing a coin. Sometimes you might toss a coin and get three "heads" in a row. Likewise, with a co-dom trait, you might hatch out several normals in a row...or several morphed individuals.

I still wonder how many of the tokay morphs are similar to crested geckos "morphs". What I mean by that is, many of the crestie "morphs", are just simply variable and you just don't know for sure what might pop out from one breeding to the next. Just because it's different doesn't mean that it's going to reproduce true.

 

[tombo46]

If it's co-dom, 2 offspring isn't really a very good sampling to base from. Co-dom would mean that you have a 50/50 chance of hatching out a morphed individual. That's like tossing a coin. Sometimes you might toss a coin and get three "heads" in a row. Likewise, with a co-dom trait, you might hatch out several normals in a row...or several morphed individuals.

I still wonder how many of the tokay morphs are similar to crested geckos "morphs". What I mean by that is, many of the crestie "morphs", are just simply variable and you just don't know for sure what might pop out from one breeding to the next. Just because it's different doesn't mean that it's going to reproduce true.

Thanks for the reply Ethan. I think you and me have different meanings to the word codominance. I have always taken it to mean that at animal that is heterozygous for a co-dominant trait would express at least some of the phenotype of the original animal. Not that they animal is either 100% visual or 100% normal. If it was codominant I would have expected something like a green patterned animal not a 100% normal or a 100% olive.

An example of what I mean would be leatherback/silkback Beardies. Animals with 1 copy of the gene would show a smooth appearance whereas animals with 2 copies would be completely scaleless. This is my definition of codominance.

The aforementioned green patterned animals has been seen in Europe when breeding a blue headed green to a normal. We call them "dirty olives".

I was just curious to find what other people have seen though. Some people have said its dominant and some say codominant but I've never seen anyone say simple recessive yet.

 

[tombo46]

I know Wikipedia isn't always the best source of reliable information but the beginning description is what I've always understood codominance to be...

Codominance - Wikipedia, the free encyclopedia

 

[YoursTruly]

My only morph as of now is a Patternless Blue Head Green Female, I'm looking to breed her and have also been looking into what others have found with the gene. I have not talked to anyone who has said they were dominant, however I have talked to breeders who have proved out their gene to be a simple receive, and others who have proved it out to be co dominant. so I'm not quite sure what will come of it... some have explained to me, that their may be multiple strands of a gene out their which are genetically different.

 

[Riverside Reptiles]

A good example of a co-dom trait in the world of herps is the classic hypo trait in boas. If you breed a hypo boa to a normal, you will get (on average) half of the litter as hypos and half as normals.

And again, a trait doesn't have to be consistent with being either Dom, Co-dom, or Recessive. I point again at animals like crested geckos that have huge variability in color and pattern, but don't necessary breed true in any way, shape, or form. There's still a lot to figure out about tokay morphs and how they all really work. These things take time and lots of breeding to actually prove out. The simple recessive morph are the easy ones to prove out. It's the rest of the stuff that can leave you scratching your head wondering.

 

[billewicz]

So, I've bred Olives x Olives and produced all Olives. Blue Headed Patternless Greens x Blue Headed Patternless Greens have produced the same.

So far, any patternless 'type' to any other patternless 'type' have produced all patternless animals for me.

Any morph to a normal has always produced a normal looking offspring so far.

Good luck,

Michael