is this real?

[Ssthisto]

Yup - which would explain why you can't "breed for" paradox (except by breeding lines that are prone to having twin eggs, for example).

[bladeblaster]

Ssthisto, I read your conjoined twin theory before, and as I said then it made a lot of sense to me. However I have since read an opinion that it is the ultimate expresion of co-dominance i.e. both the normal and the albino genes are shown. Same as cross pollenating a red and white flower and getting a white flower with pink stripes. Also that the fact that this isn't reproducable does not detract from the method of inheritance?

I would be interested to here your views on this.

Thanks,

Terry.

[reptilefever]

chop shop special lol

[KING_GONZO]

looks like a burn victim

[Owzy]

God I hope not that is horrible

[Ssthisto]

Originally Posted by bladeblaster

Ssthisto, I read your conjoined twin theory before, and as I said then it made a lot of sense to me. However I have since read an opinion that it is the ultimate expresion of co-dominance i.e. both the normal and the albino genes are shown. Same as cross pollenating a red and white flower and getting a white flower with pink stripes. Also that the fact that this isn't reproducable does not detract from the method of inheritance

The problem with the idea of this being "codominant" is that it has *already* been proven that albino is recessive to normal.

If it were codominant, it would *always* happen that you got patches of one colour and patches of the other when you're looking at a het albino - not just in some breedings. Normal would be normal, homozygous albino would be albino, and het albinos would be patched.

If it were codominant you would also be able to reliably reproduce "paradox" animals as well - breed any albino to any normal, and always get patchy offspring, the same as what happens if you breed a black female cat to a male ginger cat (all female offspring will be tortoiseshell).

Now, it IS possible that there's a "leaky gene" effect going here - that the paradox animals have incomplete penetrance of the albino gene - but that's not the same thing as codominance.

[bladeblaster]

Originally Posted by Ssthisto

The problem with the idea of this being "codominant" is that it has *already* been proven that albino is recessive to normal.

If it were codominant, it would *always* happen that you got patches of one colour and patches of the other when you're looking at a het albino - not just in some breedings. Normal would be normal, homozygous albino would be albino, and het albinos would be patched.

If it were codominant you would also be able to reliably reproduce "paradox" animals as well - breed any albino to any normal, and always get patchy offspring, the same as what happens if you breed a black female cat to a male ginger cat (all female offspring will be tortoiseshell).

Now, it IS possible that there's a "leaky gene" effect going here - that the paradox animals have incomplete penetrance of the albino gene - but that's not the same thing as codominance.

ah ok maybe I got confused, as there was discussion of incomplete dominance as well. However going back to the flower example, would incomplete dominance produce a pink flower, or would that be co-dominance, I think I may have them the wrong way around?

[Ssthisto]

Originally Posted by bladeblaster

ah ok maybe I got confused, as there was discussion of incomplete dominance as well. However going back to the flower example, would incomplete dominance produce a pink flower, or would that be co-dominance, I think I may have them the wrong way around?

Incomplete dominance produces the pink flower.
Codominance produces a red and white patched flower.

[bladeblaster]

Originally Posted by Ssthisto

Incomplete dominance produces the pink flower.
Codominance produces a red and white patched flower.

thats what I thought

So in the case of a paradox then 'if it were possible genetically' the visual result would be co-dominant as visually it has patches of both. If it were incomplete dominant it would look more hypo but the same all over?

[Ssthisto]

Yeah, if there was a mutation of the known albino gene that made a new non-recessive trait when combined with normal, the "paradox" animal would be a codominant expression of the trait. And yes, the incomplete-dominant version would probably be a very ghostlike animal.