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A question of hets and chance

kingofspades Mar 09, 2005 04:32 PM

Ok, I am still a bit new to the het thing with balls. I understand corn genetics fairly well.

Here's my question

Let's say I buy a 100% het for albino male. I breed her to a 50% het female.
What are my odds of getting an albino?
I know the variables...clutch size, etc...but hypothetically.

And number 2, is there a difference between high contrast albino and regular albino?
are they two different genes?

I'd hate to buy a high contrast het and breed it to a regular het, hoping for albinos and get nothing.

Thanks ahead of time,
-KOS

Replies (12)

toshamc Mar 09, 2005 04:45 PM

>>Let's say I buy a 100% het for albino male. I breed her to a 50% het female.>>What are my odds of getting an albino?

Well you know that the male is carrying the albino gene and there is a 50/50 chance that the female is carrying the albino gene. So if she does have the gene then you will statistically get one albino in a clutch of 4 eggs. If she isn't carrying the albino gene you'll get 50% hets.

>>And number 2, is there a difference between high contrast albino and regular albino? >>are they two different genes?

High Contrast are very yellow regular are faded yellow. I asked the same question about the genes and I've gotten different replies on this, but apparently the high contrast and regular albinos are the same gene. But when you get into the other albinos those are separate genes.

Hoe this helps!
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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

kingofspades Mar 09, 2005 04:55 PM

that helped quite a bit.

it'd be easier for me to get 2 100% het albinos.

now to keep an eye out for a deal or two

thanks
-KOS

toshamc Mar 09, 2005 05:03 PM

Two more things:

1. When buying hets - try to buy from a reputable breeder there are lots of scam artists with fake paperwork out there. Be careful and do your homework.

2. Even with 2 hets that are 100% there is always a chance that you may not get that albino for a couple of clutches. It seems particularly true in albinos that the albino gene can be a bit allusive. I've heard from several people that they've bred homo albinos together or a 100% het and a homo and not gotten any albinos. But then I've also heard some people breed a couple of hets and get 2 or 3 in the clutch. Good luck with wichever way you go!
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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

JP Mar 09, 2005 06:56 PM

Tasha...actually, if you breed to homozygous albinos, then all of the babies would have to be albinos...since both parents have two copies of the albino allele, and NO copies of the normal allele, the babies cant be normal.

For the original poster, feel free to check out my genetics page. I'll link it below!
Joe Pociask Pythons....Genetics Info

JP Mar 09, 2005 07:00 PM

1st, I noticed that Tosha should be spelled with an O, second....the first "to" should of course be "two". Now, since I didn't finish reading the rest of my post so..... their May bee sum moore tyepows inn mye preeveous recsponce.....lol

toshamc Mar 09, 2005 07:03 PM

You'd think huh, but I've heard a couple of different people say that they didn't get albinos from pairing two homos. Either somehow the genes were incompatible or something, but it's happened before.
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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

JP Mar 09, 2005 07:13 PM

Well, as far as everyone knows, there is only one strain of albino (or all the known strains are compatible.) If someone bredd two homozygous albinos and produced normal babies, then this is what happened:

1) (sperm retention)-the female bred a normal male or het male the year before and retained sperm.

or

2) some other bizzare scenario...i.e. an escaped snake or something.

or

3) a random chance mutation of an albino allele back to a normal allele (this is by far the most bizarre and longshot of the three).

Anybody have any other possible explanations?

toshamc Mar 09, 2005 07:46 PM

My first thought would be sperm retention too but then came across this, which makes sense:

I will try to make this simple and still explain things.
first, regarding two incompatible albinos crossing.

A phenotype, the visible trait, is albino however they have differant genotypes, the part of their genetic make up that has a mutation which makes them albino.

Also, each animal has two sets of genes, one from each parent. In order to get an Albino you need the parents to carry the albino genotype wether it is expressed in the phenotype or not (homoxygous and heterozygous), and the albino genotype they carry must be the same. The albino is the offspring that recieved that gene type from both parents, if it recieved one from one parent and a normal gene from the other it would appear normal, that is dominant over albino, and heterozygous for albino, carrying the gene but not expressing it.

when you cross two ressesive traits incompatible with each other the offspring look normal but are hets for both kinds, why do they look normal?
They look normal because they recieve one genotype from each parent, and nothing affects the phenotype, the reason they are normal is because the parents, althought they had a pair of genes the same still carried the normal gene, it was just masked.
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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

JP Mar 10, 2005 05:27 AM

Again, the example you have given there is exactly what hapens when you cross a Jollif axanthic with a VPI axanthic, for example. At thjis time, noone has shown that albinism in BPs can be incompatible (two different genes at work).

toshamc Mar 10, 2005 10:50 AM

Well I'm not going to argue with you, people have said it's happened, you can believe it or not. I don't care.
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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

CJBianco Mar 10, 2005 11:00 AM

the question: "Does anyone have documented proof that Albino x Albino may not always result in all Albinos?"

Chris =/
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My favorite Ball Python morphs: Albino, Piebald, Ivory, Pearl, and Blue-Eyed Leucistic

gecko_den Mar 09, 2005 07:27 PM

Either they are het or not het. You stated the male is 100% for sure a het, and the female is the unknown. So, if she is normal, you have 0% chance of an Albino from the pairing, if she is het you have a 25% chance.......
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Sam
Gecko Den
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