Reptile & Amphibian Forums

Here are a couple of non creams

The creamsicles are the amelanistic F2 offspring. I'm guessing that the two you've shown us are F1's? If you mate them together (and both are het for amelanism) then you should obtain a 1:2:1 clutch of creamsicles, het creamsicles and non-hets.

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tricia

These are f2 and f3.

>>These are f2 and f3.

I told you that the ratio of creamsicles, hets and normals, in the F2 clutch would be 1:2:1.
What that means is that only 25% of the F2's would be creamsicle. 75% would be phenotypically normal, but 50% would be genotypic hets, and 25% would be genotypic normals. There's no way that the F2 clutch would be 100% creamsicles. As for the F3's, what you'd get would depend on the genotype of the F2's that you paired to each other.

If you paired two of the F2 creamsicles, then the F3's would be all creamsicles. If you paired a creamsicle with a het, then the F3's would be 50% creamsicles and 50% hets. If both of the F2's that you mated to each other were genotypic hets, then the F3 generation would be 1:2:1. If one of the F2 pair was a genotypic normal, mated with a genotypic het, then all of the F3's would be phenotypic normals, but 50% would be genotypic hets. Finally, if you mated a genotypically normal F2 with a creamsicle, the F3 clutch would be 100% phenotypic normals, genotypically het for creamsicle.

It is a simple Mendellian recessive trait, and the progeny is easily predictable.

You should also be aware that there is an "albino" variant of pure Emoryi's rat snake. This animal bears very close resemblance to the intergrade creamsicle. When the pure Emoryi's albino is mated to an amel guttata, or a creamsicle, the resulting F2 offspring are black-eyed.

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tricia

Two NORMALS make??? YEP NORMALS (when not het for blah blah blah).

Two NORMALS make??? YEP NORMALS (when not het for blah blah blah).
I understand what a Creamsicle is and how to arrive at one. However not every cross has to be an albino resulting in an albino to be interesting. Have a nice day.

I think the point you are missing is that F2 would be 25% creamsicles only if the Cornsnake or Emoryi in the original pairing was amelanistic. You can't always assume that all emoryi X corn crosses are done using an amel corn.

Is that not what I said to begin with?????

The first line of my first post on this subject was:

"The creamsicles are the amelanistic F2 offspring. ..."

That evidently could only happen if both parents carry the amel gene. And a person could only be 100% cure of each animal being a carrier, if each had one parents that was an amel. I thought that throughout my posts, I stressed the need to selectively breed to obtain amelanistics. Was my point not stated clearly?
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tricia