Reptile & Amphibian Forums

I was looking at the genetic page on ther sk web site (I like the improvements by the way) and a couple of questions came to mind, so to start out we breed an albino to an azanthic and get a clutch of F-1 normal looking double het for snow.
Now here is the first question, if we take an F-1 male double het(because it will hit maturity faster) and back breed it to the mother...question 1, is this clutch F-1,F-2 or F-1.5 ?The mother would be producing yet another F-1 clutch but the offspring is F-1.And the other question at this point is would the offsprings in this clutch be albino het for azanthic,azanthic het for albino and have the possibility of hitting snow? Or would they all be again normal looking leaning heavy on the mothers gentic(say albino) and 50 percent azanthic.
The reason for the question is to obviously skip an F-generation on the trip to snow.
Now just a clarification because I get so confused, if we take an albino and breed to an azanthic the offspring are F-1 normal looking double hets
we breed these normal looking double hets and the clutch will be F-2 and some animals will look like either albino or azanthic and will carry(be het for) the other gene.
When these animals are bred together the clutch is F-3 and this breeding will bear snow,azanthic het and albino het
Anyone have any opinions? Would back breeding at F-1 save time or skip the F-2 phase? Or at least get things going until the 1 females mature? Or would it be closer to repeating a phase?
Thanks Craig

After breeding to produce double het. I think you should breed double hets back to mom dad. Why? Why? When you breed back to "visible" morph you will get "visible" morph babies. 50% of clutch should be "visible". The ones that look normal will be hets for albino or axanthic [depending on which was mom or dad]. Now all visible morph when bred back to their dh pop or mom will give you one in eight chance for snow. Remember that the "visible" morph obviously carrying the opposite gene.[a het like albino het for axanthic or reverse]

example

mom albino x dad axanthic = dh snow

dh snow back to dad = axanthics 50% possible het snow and het axanthics 50% dh snow.

Now I have a headache!!!!!

-----
RicK Denmon

Ball Boutique,Inc.
New Forum!!!!

>I was looking at the genetic page on ther sk web site (I like the improvements by the way) and a couple of questions came to mind, so to start out we breed an albino to an azanthic and get a clutch of F-1 normal looking double het for snow.

>Now here is the first question, if we take an F-1 male double het(because it will hit maturity faster) and back breed it to the mother...question 1, is this clutch F-1,F-2 or F-1.5 ?

None of these. The babies are backcrosses.

>And the other question at this point is would the offsprings in this clutch be albino het for azanthic,azanthic het for albino and have the possibility of hitting snow? Or would they all be again normal looking leaning heavy on the mothers gentic(say albino) and 50 percent azanthic.

heterozygous albino, heterozygous axanthic x albino -->
1/4 albino
1/4 albino, heterozygous axanthic
1/4 heterozygous albino (looks normal)
1/4 heterozygous albino, heterozygous axanthic (looks normal)

Sorry, no snows.

Personally, I'd get a different albino female to mate that F1 male too. That way the inbreeding is less extreme.

>Now just a clarification because I get so confused, if we take an albino and breed to an azanthic the offspring are F-1 normal looking double hets
we breed these normal looking double hets and the clutch will be F-2 and some animals will look like either albino or azanthic and will carry(be het for) the other gene.

Statistically, the F2 generation produces the following:
9/16 normal looking
3/16 albino (2/3 of the albinos will also be heterozygous axanthic)
3/16 axanthic (2/3 of the axanthics will also be heterozygous albino)
1/16 albino, axanthic (snow)

>When these animals are bred together the clutch is F-3 and this breeding will bear snow,azanthic het and albino het
>Anyone have any opinions? Would back breeding at F-1 save time or skip the F-2 phase? Or at least get things going until the 1 females mature? Or would it be closer to repeating a phase?

If ball pythons had many babies per year, I'd say skip it. With the small numbers of eggs produced, a snow will probably not appear in the first year. Building up the numbers of albinos that may also be heterozygous axanthic will probably not speed up the production of the first snow. It will increase the number of snows produced in later years.

Depending on price and health factors, you may want to do a backcross of F1 to axanthic instead of F1 to albino.

Paul Hollander

np