Reptile & Amphibian Forums

Ok, I've had a few people tell me that if you cross a pastel to a normal you get all pastels, and another told me it was half and half.
Which is it?

I am still trying to grasp all of these genes.
BP genetics are so much different from corn genetics.

thanks,
KOS

Theoretically - you'd get 50/50 by breeding a pastel to a normal. Unless it is a super pastel (homozygous) then you would get all pastels.

>>Ok, I've had a few people tell me that if you cross a pastel to a normal you get all pastels, and another told me it was half and half.
>>Which is it?
>>
>>I am still trying to grasp all of these genes.
>>BP genetics are so much different from corn genetics.
>>
>>thanks,
>>KOS
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Tosha

8.10.0 Ball Python (Harry and Fluffy and currently un-named)
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope)
7.9.5 Fish (1,2,3,4...)
0.0.1 Frog rescued from pool skimmer
0.0.2 Lizards rescued from pool skimmer

does that make Wild Type a co-dominant gene?

nm

nm

I own both the domains.

Thanks for the plug and continued support!!!!!!!

Markus
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www.ballpython.ca

I'm going to go out on alinb and say No - Co dominant, dominant recessive are all terms regarding genes that vary the animal from "wild-type"

>>does that make Wild Type a co-dominant gene?
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Tosha

8.10.0 Ball Python (Harry and Fluffy and currently un-named)
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope)
7.9.5 Fish (1,2,3,4...)
0.0.1 Frog rescued from pool skimmer
0.0.2 Lizards rescued from pool skimmer

.
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Tosha

8.10.0 Ball Python (Harry and Fluffy and currently un-named)
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope)
7.9.5 Fish (1,2,3,4...)
0.0.1 Frog rescued from pool skimmer
0.0.2 Lizards rescued from pool skimmer

Right. The wild type allele is the standard, and the mutant allele is compared to the standard. So pastel is codominant to the wild type allele, not the other way around.

Paul Hollander

All alleles WT or other wise can be compared using the
Dominant, Co-dominant, and recessive terminology.

The WT allele of the pastel gene is CO-dominant with the pastel gene. That means "Co" as in they share dominance. It would NOT make sence to say that the pastel allele is co-dominant and the WT allele is "standard". They are both co-dominant.

In the case of recessive genes the WT allele is dominant. So the WT allele of albinism is the dominant gene, whereas the albino gene is recessive.

Hope that helps...and I hope nobody ever finds a incompletely dominant sex linked gene, it would take a month to explain that one.

Although WT is not really a gene, but a collection of the most frequently found genes in the wild. In the case of pastels, the corresponding WT gene is co-dominant with the pastel gene.

so yes, they are co-dominant (WT and Pastel genes share dominance) for this specific gene

Technically speaking, a pastel (having one allele for the pastel morph) to normal gives you a 50/50 chance of producing a pastel. That’s a 50% chance on each egg.

A super pastel (having two alleles for the pastel morph) to normal gives you 100% pastels. That’s 100% on each egg being a pastel.
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Larry Walker

Here's a great link for ball python genetic study:
BallPython.com

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Larry Walker

think of it as a het for super pastel that you can actually tell whether or not it is a het, just by looking at it. If you think of it that way, it will make more sense. (all of you BP breeders - please correct me if I am wrong)

You are absolutely correct!
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Larry Walker