Posted by:
Paul Hollander
at Wed Jul 7 17:31:54 2010 [ Email Message ] [ Show All Posts by Paul Hollander ]
>As I get more an more into ball pythons, the gen combination really fascinates me while giving me a headache at the same time.
>Even just with double gens, I'm having a hard time to get an idea how to pair up the breeders to get the result.
>For example:
>1. axanthic pastel. I know you use a pastel and breed it to a axanthic. but axanthic is recessive trade and pastel is co-dom. Do I just pair them up and get axanthic pastel or one of those has to be het or homo?
Dominant/codominant/recessive does not matter in this sort of problem.
It is easiest if you figure out the genes in the necessary gene PAIRS. One member of each gene pair comes from the mother and the other member from the father.
Axanthic pastel has a pair of axanthic genes and a pastel gene paired with a normal gene (axanthic//axanthic pastel//normal). Each parent must give the baby an axanthic mutant gene. And one parent gives a pastel mutant gene while the other parent gives a normal gene.
Each parent must be at least heterozygous axanthic to produce an axanthic baby. That means that both parents are het axanthic OR both parents are axanthic OR one parent is axanthic and the other is het axanthic.
At least one parent must be pastel, but both parents cannot be super pastel. So one parent is pastel and the other is normal OR both parents are pastel OR one parent is pastel and the other is super pastel.
>2. caramel glow. I know it takes two double het to get these, because the two gens used to make caramel glow are both recessive. But is it normal DH ghost/caramel X normal DH gohost/caramel?
I'm not up on caramel glows. But if a caramel glow has two caramel mutant genes and two ghost mutant genes (caramel//caramel ghost//ghost), then both parents are AT LEAST DH ghost/caramel. Caramel glow x caramel glow also produce caramel glow babies.
>3. queen bee. triples are really messing up my head. lesser and pastel which are co-dom with spider which is dom. I tried to google for some answers but I just get more and more confused.
Queen bee has a spider mutant gene paired with a normal gene, a pastel mutant gene paired with a normal gene, and a lesser platinum mutant gene paired with a normal gene. IOW, spider//normal pastel//normal lesser//normal
At least one parent has a spider mutant gene paired with a normal gene. At least one parent has a pastel mutant gene paired with a normal gene. At least one parent has a lesser platinum mutant gene paired with a normal gene.
Usually, one parent has a mutant gene paired with a normal gene in two gene pairs and two normal genes in the third gene pair. And the other parent has two normal genes in two gene pairs and a mutant gene paired with a normal gene in the third gene pair. However, a queen bee x normal will produce queen bee young, too.
>4. more questions about triples such as axanthic killer bee. There's recessive, dom, and co-dom gen in it. What kind of pair do I need to get the result?
An axanthic killer bee has the gene pairs axanthic//axanthic pastel//pastel spider//normal. There are multiple ways to get one. It helps to make a list of the different possible one gene pair matings.
1. AA x AA --> all AA
2. AA x Aa --> 1/2 AA, 1/2 Aa
3. AA x aa --> all Aa
4. Aa x Aa --> 1/4 AA, 2/4 Aa, 1/4 aa
5. Aa x aa --> 1/2 Aa, 1/2 aa
6. aa x aa --> all aa
A = normal
a = axanthic
We want axanthic//axanthic (= aa) babies. Matings 4, 5, and 6 produce aa babies.
A = pastel
a = normal
We want to produce pastel//pastel (= AA) babies. Matings 1, 2, and 4 produce AA babies.
A = spider
a = normal
We want to produce spider//normal (= Aa) babies. Matings 2, 3, 4, and 5 produce AA babies. Nobody has reported a spider//spider royal, so we can eliminate matings 2 and 3.
One parent is either normal//axanthic or axanthic//axanthic AND either pastel//normal or pastel//pastel.
The other parent is either normal//axanthic or axanthic//axanthic AND either pastel//normal or pastel//pastel.
In addition, one parent is spider//normal and the other parent is normal//normal. OR both parents are spider//normal.
I figure there are about 18 different pairs that could produce an axanthic killer bee baby.
Once you know what parentage is possible, you compare that with what snakes are available.
Clear as mud?
Paul Hollander
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RE: ?double/triple gen combinations? - Paul Hollander, Wed Jul 7 17:31:54 2010