Question about hets

[AaronSB]

Let's say I breed a homozygous motley and a homozygous hypo.. (Would homozygous just mean they have the phenotype of motley and hypo?) ...and they produce 100% het hypo, het motley. Does this mean they would all be either het hypo OR het motley, or het hypo AND het motley?? Also does het only refer to genotype.. Could/would the phenotype be affected with this pairing? Could a hypo motley be produced? Or would they all be motleys, hypos, and normals...? Or just normals het for hypo or motley??

I'm just trying to understand all of this. Thanks

[Velle96]

Re: Question about hets

Great question. I would also like to know the answer to this.

Waits...

[Zaphod42]

Re: Question about hets

Terminology in the reptile world is kind of screwy. Generally homozygous morphs are referred to as "Supers" if that morph is dominant or a visual het. Confusing? Yep. Examples. Yay!

Hypo - If they inherent the genes from one parent they visually look like a hypo, so technically they're a visual het but no one ever refers to them as this. People just say "hypo". If you breed a hypo to a normal boa approximately 50% of the litter would be hypos and the other half would be normals. Now if that same hypo actually inherited genes from both parents (assuming both parents are hypos) then it would be a super hypo (aka homozygous). This means if you bred it to a normal boa 100% of the offspring would be hypos (visual hets)

Albino - If you bred an albino to a normal boa, all off the offspring would look normal but they would all be 100% het for albino. Because albinos are visually different from het albinos nobody refers to them as supers or homozygous.

Motleys - Similiar to hypos in that they are a visual het. The super form of Motleys almost always die early on and as far as I know they've never been successfully bred. Generally people avoid motley x motley breedings because of this.

Crossing two different morphs can have different results depending on the morph. Back to your original question. If you were to cross a hypo and a motley you would get 25% hypos, 25% motleys, 25% normals, and 25% of them would be both hypo and motley. Like this -



Hope that helps. I'm sure somewhere here will correct me if I got anything wrong.

[Velle96]

Re: Question about hets

Terminology in the reptile world is kind of screwy. Generally homozygous morphs are referred to as "Supers" if that morph is dominant or a visual het. Confusing? Yep. Examples. Yay!

Hypo - If they inherent the genes from one parent they visually look like a hypo, so technically they're a visual het but no one ever refers to them as this. People just say "hypo". If you breed a hypo to a normal boa approximately 50% of the litter would be hypos and the other half would be normals. Now if that same hypo actually inherited genes from both parents (assuming both parents are hypos) then it would be a super hypo (aka homozygous). This means if you bred it to a normal boa 100% of the offspring would be hypos (visual hets)

Albino - If you bred an albino to a normal boa, all off the offspring would look normal but they would all be 100% het for albino. Because albinos are visually different from het albinos nobody refers to them as supers or homozygous.

Motleys - Similiar to hypos in that they are a visual het. The super form of Motleys almost always die early on and as far as I know they've never been successfully bred. Generally people avoid motley x motley breedings because of this.

Crossing two different morphs can have different results depending on the morph. Back to your original question. If you were to cross a hypo and a motley you would get 25% hypos, 25% motleys, 25% normals, and 25% of them would be both hypo and motley. Like this -



Hope that helps. I'm sure somewhere here will correct me if I got anything wrong.

So in that case, what wil you get if its Hypo x Albino Motley? Curious...

[Zaphod42]

Re: Question about hets

The results would actually be the same as motley x hypo except all the babies would be 100% het albino. Now if that hypo was het for albino then you could also get some albinos, sunglows (hypo albino), albino motleys, and sunglow motleys. It's too early for my brain to do the math to give you the exact percentages. Also keep in mind percentages only tell you the chances of that particular morph showing up in the litter. There are no guarantees you would get all of them in one litter, chances are you wouldn't.


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[AaronSB]

Re: Question about hets

Ok I'm getting it. So when the genetics wizard tells me (in the case of albino x motley) that the litter produced is 50% motley, 50% het albino...does that mean mean 50% NORMAL het albino?

AAAAND why does *motley albino x hypo* produce offspring that are 100% het albino? Wouldn't both parents need to carry the albino gene? That just confused me again haha

[Zaphod42]

Re: Question about hets

An albino carries both sets of genes which means it has to pass off the albino gene to it's offspring. So if you breed an albino to a normal boa 100% of the offspring will be het for albino. So if you crossed an albino x motley, you would get 50% motleys and 50% normals but all of them would be het for albino.


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[AaronSB]

Re: Question about hets

Ohhh okay yeah, because albinos are homozygous... So anytime the generator says "het (insert morph)" it is a WT phenotype.. Got it. Thanks!

[paulh]

Re: Question about hets

Let's say I breed a homozygous motley and a homozygous hypo.. (Would homozygous just mean they have the phenotype of motley and hypo?) ...and they produce 100% het hypo, het motley. Does this mean they would all be either het hypo OR het motley, or het hypo AND het motley?? Also does het only refer to genotype.. Could/would the phenotype be affected with this pairing? Could a hypo motley be produced? Or would they all be motleys, hypos, and normals...? Or just normals het for hypo or motley??

Useful genetics material

http://www.redtailboas.com/f115/no-frills-genetics-guide-53782/

Handbook - Genetics Home Reference

Definitions:
Homozygous = the two genes in a gene pair are the same.
Heterozygous = the two genes in a gene pair are not the same.
Genotype = the identity of the genes.
Phenotype = the appearance produced by the genes interating with the environment.

Homozygous and heterozygous only refer to genotype. Those four words are so poorly understood among the general run of herpers that I often list both phenotypes and genotypes to be sure everyone understands. As in, "If a super motley boa (with a pair of motley genes) is mated to a super hypo boa (with a pair or hypo genes) ...."

You are now going to be dumped in the middling deep part of the genetics swimming hole. Consider yourself warned.

Hypo is dominant to its corresponding normal gene. Motley is codominant to its corresponding normal gene.

As Zaphod42 wrote, hypo motley boas have been produced. And they have been bred to normal boas. The claim is that hypo motley mated to normal produces only hypos and motleys. This could indicate that a hypo motley snake has one gene pair made up of a hypo gene and a motley gene. Or it could indicate that there are two gene pairs (a hypo gene with a normal gene in one pair and a motley gene with a normal gene in the other pair). If two gene pairs, they are closely linked in one pair of chromosomes. I have not seen enough information to make up my mind.