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My understanding is if you breed a pair of double hets who are carrying the hypo and albino gene, you have a 1 in 16 chance of producing a double homozygote. So what are the "average" percentages of hets for either trait, hypo, albino, double hets, and normal if any?
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Here is the theoretical probabilities, although they can many times be VERY different from this in actuality.

ALL the hets and/or normals= phenotypes will all be termed as "possible" double hets because you will have no idea which one's are carriers of either trait(s), or which ones are normal.

Also, by the same token every hypo and amel will all be looked at as possible hets for both traits since you won't know which(if any) traits they might have.

Offspring are predicted to be...

4/16, Het for Amel, Het for Hypo (1/4)
2/16, Hypo, Het for Amel (1/8th)
2/16, Amel, Het for Hypo (1/8th)
2/16, Het for Hypo (1/8th)
2/16, Het for Amel (1/8th)
1/16, Amel, Hypo (masked hybino) (1/16th)
1/16, Hypo ****
1/16, Amel ****
1/16, Normal ****
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"a snake in the grass is a GOOD thing"

serpentinespecialties.webs.com

And with cornsnakes that have a higher number of eggs (14-35) in a clutch, it is easier to get that 1/16 that shows both......whereas with cal kings it is harder to get that 1/16 when the clutches average a lot less than 16.

But in the past couple of years the snake gods have been good to me.

Kerby...
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Life is like a bunch of fish in an aquarium....we all get along (bonding) until I want to eat you....and I do.

100% agreed Kerby. There is a HUGE difference there for sure, and as you know that is only theoretical with a clutch of 16 eggs which RARELY EVER happens with getula. As you mentioned the odds can drop drastically with much smaller clutches, or good luck can happen as you have had sometimes.

That was a great point to add to the post..

~Doug
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"a snake in the grass is a GOOD thing"

serpentinespecialties.webs.com

Thanks for pointing that out, Kerby. I guess it could take 2 or more years to hit that 1 in 16 chance.
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Thanks for pointing that out, Kerby. I guess it could take 2 or more years to hit that 1 in 16 chance.

Ha HA! I guess if they are not bonded and kept together to produce 3 clutches per year they will take 2 or more years..
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"Wild caught or not, if the snake needed to be fed more, it needed to be fed more. Case closed."

Billy (Discern)

www.Bluerosy.com

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That's right, what was I thinking. lol
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Yeah, but someone needs to tell Dmong about bonding. Maybe i should make a post.

i55.tinypic.com/rhvk9s.gif

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"Wild caught or not, if the snake needed to be fed more, it needed to be fed more. Case closed."

Billy (Discern)

www.Bluerosy.com

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Thanks a lot, Doug. I forgot about that point of not knowing what was het and not het, so they bust be labeled as possible hets. What does 1/16 normal*** mean? Does that mean it could be het or not het?
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Yeah, it only means that "theoretically" out of the 16 hatchlings ONE will be completely normal(not het for anything), but just like all the others, you will not be able to determine which would be normal, or hets, so every single normal looking one would be a "possible" het for hypo and amel. Some proving out for either trait(or even both) in later breedings that are done and some probably not. You just won't know without test breeding them to known snakes with the same like genes, or to each other and see what they actually produce to know.

Say if you bred one normal looking one to another hypo, hybino, or ghost, and did produce a hypo or two in the clutch, you would then KNOW your normal looking snake was indeed at least het for hypo. This would also apply to the amel gene as well.

~Doug
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"a snake in the grass is a GOOD thing"

serpentinespecialties.webs.com

OK thanks a lot, Doug. That makes perfect sense.
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.
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"a snake in the grass is a GOOD thing"

serpentinespecialties.webs.com

>>My understanding is if you breed a pair of double hets who are carrying the hypo and albino gene, you have a 1 in 16 chance of producing a double homozygote. So what are the "average" percentages of hets for either trait, hypo, albino, double hets, and normal if any?
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just remember that these percentages are derived from huge data sets and the results you see from a few clutches may vary widely from that.

when i was breeding ghost brooks i got a bunch of ghosts, hypos and normals and almost no axanthics.

my one and only (?) clutch of 2x ws hypo x 2x ws hypo produced two ws hypos. i think it was 6 or 7 eggs...

anyhow, enjoy!

daveb
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odelay odelay odelay hee hoooo...
heeeeya huhhhh!
~Back in the saddle (Aerosmith)

Thanks for that, Dave. Sounds like fun if you can't always predict it.
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>>My understanding is if you breed a pair of double hets who are carrying the hypo and albino gene, you have a 1 in 16 chance of producing a double homozygote. So what are the "average" percentages of hets for either trait, hypo, albino, double hets, and normal if any?
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go to the link and scroll down just a little to breeding expectations and then double mutations. It gives the fractions (you can convert to percentages!) AND some explanation of how those outcomes were determined.

breeding expectations

Thanks a lot for that link!
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