The codominance myth

Fair enough. I imagine the terms in use currently with the BPs are not likely to change. But you will be able to sleep at night being technically correct. ;)

I will go back to playing with snakes.

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Seriouslly whats the point? However you want to say it those of us who breed know what snakes to put together to produce what we are going for. This is just gonna turn into one of those 8 page threads about tomato timoto.

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Would you agree that there are genetics questions about snakes that are still unanswered?

I for one am curious about female Deserts reproduction and homozygous spiders. There's a long list of lethal snake morph combos NERD put together and is available on youtube. NERD learned the hard way. It would be nice to identify why certain gene combinations are lethal so breeders don't have to learn the hard way and waste entire clutches as well produce sickly snakes. The first step is learning how the different genes interact which is dominant, recessive, codominant, incomplete, etc.

Plus, some of us enjoy discussing genetics.

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Originally Posted by jinx667

Fair enough. I imagine the terms in use currently with the BPs are not likely to change.

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You are probably right.

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Originally Posted by jinx667

But you will be able to sleep at night being technically correct. ;)

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Nothing wrong with being correct.

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Originally Posted by jinx667

I will go back to playing with snakes.

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Don't play too much with your snake. It will make your palms hairy. ;)

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Originally Posted by Jabberwocky Dragons

Plus, some of us enjoy discussing genetics.

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I certainly do :gj:

Well you guys wont be unlocking the desert female issue. They have been worked with for many many years and same result. Good luck figurin that out. Yes genetics is always a fun topic. I just see where this thread is going lol

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Originally Posted by snake lab

Well you guys wont be unlocking the desert female issue. They have been worked with for many many years and same result. Good luck figurin that out.

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I wasn't trying to.

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Originally Posted by snake lab

I just see where this thread is going lol

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Will you share with the rest of us?

Your explanation of incomplete dominant is the best one I've seen so far (I'm just assuming it's correct). The ones before talking about red, white, and pink flowers I never got. Seems like if you had small enough dots a white and red dotted flower might look pink. Maybe pastels have alternating dots of super pastel and normal if we were to just look close enough? I'm all for being correct though so will try to remember to use incomplete dominant like I'm trying to switch from "ghost" to "hypo".

BTW, the homozygous spider might have been the subject a previous poster thought this post was heading to. No one has yet come forward with a proven homozygous spider to support the claims that it is a dominant mutation and some of us suspect that it might be homozygous lethal. Pinstripe is proven dominant so would be a better example.

I've read this thread and I can say I'm a bit confused but I think I grasp a bit. I'm wondering if multi gene morphs are considered co-dominant? For example killer bee. It's the super pastel and spider. Both genes are expressed in full together. Or does it have to be the same allele? Like paradox. If paradox was genetic would it be an example of co-dominance? This thread is interesting Btws.


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Originally Posted by interloc

I'm wondering if multi gene morphs are considered co-dominant? For example killer bee. It's the super pastel and spider. Both genes are expressed in full together. Or does it have to be the same allele? Like paradox. If paradox was genetic would it be an example of co-dominance? This thread is interesting Btws.

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When you have 2 or more genes in the same animal (combo) you get a "blend" of the individual effects of each gene. But you cannot say one gene is dominant or recessive over the other. These terms apply only to the alleles of a single gene.

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Originally Posted by RandyRemington

Your explanation of incomplete dominant is the best one I've seen so far (I'm just assuming it's correct).

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Thank you.

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Originally Posted by RandyRemington

The ones before talking about red, white, and pink flowers I never got. Seems like if you had small enough dots a white and red dotted flower might look pink. Maybe pastels have alternating dots of super pastel and normal if we were to just look close enough?

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That reminds me of pixels in a computer screen. But that is not how it works in living organisms. I'll try to explain. Somewhere in the genome of BP's there is a gene responsible for making a protein. That protein makes the brown parts of the normal snake's pattern. This gene suffered a mutation originating a copy that does not work. We call it the pastel mutation. The pastel mutation is not very good at making the "brown protein" so the snakes pattern becomes lighter. When the snake is het, it still has 1 normal functional allele. That is why we can see some light brown (yellow) in the pattern. When the snake has 2 copies of the pastel mutation no "brown protein" is produced and we get a "white" pattern.

This is a hypotesis based on the general way genes function. Further studies of BP's biochemistry are necessary to prove/disprove this.

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Originally Posted by RandyRemington

BTW, the homozygous spider might have been the subject a previous poster thought this post was heading to. No one has yet come forward with a proven homozygous spider to support the claims that it is a dominant mutation and some of us suspect that it might be homozygous lethal. Pinstripe is proven dominant so would be a better example.

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Maybe spider is lethal in homozigous form, but even if that is the case, unless it would produce a superform should the snake survive, it would still be dominant. Maybe we will never know.

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Originally Posted by RandyRemington

Pinstripe is proven dominant so would be a better example.

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I agree.