Leucistic X Normal Results?

[HQReptiles]

Geckoguy157,

If you breed a patternless gecko to a normal all the offspring will carry the patternless gene, but will appear normal. This is referred to as 100% heterozygous for patternless. Same principal applies to any animal; it is referred to as a recessive gene. For a recessive gene to be visible you have to be homozygous for that gene. All hets will appear to be normal. It doesnt matter if we are talking about cats, dogs, mice, snakes, or geckos; the same principal applies if we are dealing with a simple recessive gene.


Matt.

[geckoguy157]

ok well your idea is kinda strange but then how do u get 50 % het geckos and the other ones and you cant tell me there isnt cause i know there is and own a 66%het paternless for blizard lizard

[HQReptiles]

Ok, I’m gonna try and explain this but it’s not easy.

When you breed an animal that is het for a recessive trait to another animal that is het for the same recessive trait together the following would be the resulting offspring:

25% would displays the recessive trait
50% would be normal appearing but carry the recessive trait (100% hets)
25% would be completely normal.

I think what you are referring to as a “66% het patternless for blizzard lizard” is this:

Any resulting offspring that hatch from the above pairing have a 66% chance of carrying the recessive genes; thus they are 66% possible het for what ever.

The term 50% het is the amount of the offspring from the above pairing that statistically carry the recessive gene.

I guess what I’m saying is that there is no difference in 50% hets and 66% hets. It all depends on who you are talking to and how they decide to describe their offspring.

Hope that helps,

Matt.

[HQReptiles]

After reading my post again, it is possible to get a 50% het for what ever gecko. Just like Clownfishie said above, breed a normal to a known het for what ever gecko. The resulting offspring would be 50% possible het for what ever.


Matt.

[MartinW]

I think this is how it works:

To get 66% chance het, considering offspring from two het parents, there's equal chances of the following occuring:

1. Father passes down normal gene + Mother passes down normal gene
2. Father passes down patternless gene + Mother passes down normal gene
3. Father passes down normal gene + Mother passes down patternless gene
4. Father passes down patternless gene + Mother passes down patternless gene

Obviously you'll know through observation that case 4 is a homozygote for patternless. So, if we consider *only* the ones we are not sure of by simple observation (remember het patternlesses look the same as homo normals) there's a 2 in 3 chance, or 66% chance, that a normal looking gecko from two hets is a het as well.

Which is almost what Matt explained, just one step further.

Martin

[SnowSnake]

Alicewave:

What you have is a normal baby that looks different. You can see that as an adult she looks the same as a normal leo so if you breed her to a normal you might get babies to have some crazy designs but the odds are that they will look normal as adults.


Note to all:

What Matt and Martin are explaining are recessive genes and traits. Co-dominant and Dominant genes and traits are a whole different ball game! :P

[Tim and Julie B]

Yes, it's 100% het for patternless.

[Clownfishie]

Gecko guy -- it's right Ask any knowledgeable breeder out there... if you breed an animal that displays the trait in question to an animal without the trait, all babies will be 100% het for the trait in question. Now if you were to breed a 100% het to an animal without the trait, THAT is when you would get 50% hets... and if you breed 2 100% hets together, you get 66% hets -- because you would get 25% displaying the trait (ie. patternless), 50% that were 100% hets, and 25% without the trait... only there's no way of telling the normals (without trait babies) from the het babies without breeding them to either a known het for that trait, or an animal displaying that trait -- so they're considered to be 66% hets.
Don't know if that helped at all, or just confused you even more
Genetics Wizard is not a site for a specific animal -- it's for genetics in general. Would probably work for humans too, although I've never tried it

Alice -- to the best of my knowledge, in leos all genes are recessive. Dominant & co-dominant do pop-up in snake genetics, but not in leos... That being said, Aurora is an aberrant pattern (ie. jungle, but with no jungle tail) leo -- and last I heard, people were still duking it out as to whether jungle was actually a recessive trait, or if it's just something that pops up. Like you never hear of a "het for jungle"... I'd say, if you bred her to a normal, you'd end up with maybe some normal looking babies, and some aberrant pattern babies -- she does have quite nice colour to her too, so hopefully she'd pass that along

Hope that helps a little...

[Clownfishie]

PS -- if it doesn't, I apologize -- it's late, and I'm a bit out of it... LOL

[Steve]

Thnaks guy for the poeple people who broke down the genetics a bit. I can never tell how to know is something is recessive, co-dominant or dominant. The break down that clownfishie just gave helps too, as i was confused on how to get 50% hets and stuff. I understud the 66% het thing thought, but it still helps alot when people clarify things better. Also someone elses way of saying something might make more sense then someone elses.
Thanks

[SnowSnake]

Clownfishie- Not all leo genes are recessive. Tangerine and hypo are Co-Dominant genes. "Jungle", "high yellow" could be considered Co-dominant as well.

[Clownfishie]

Snow -- there are no co-dominant genes in leos that have been identified at this time (according to what I've read/heard) -- I've just double checked my research to make sure.
You are correct in that not all leo morphs are caused by recessive genes though -- some are line bred traits (ie. produced by selective breeding) such as tangerine, snow, jungle, stripe, carrot tail, high yellow, and others. When animals possessing these traits are bred to a normal, you generally get babies that are somewhere in between...
Recessive traits include blizzard, albino and patternless.
Some leos can include both types of traits, such as a tangerine (line bred) albino (recessive)...

[MartinW]

Originally posted by Clownfishie
You are correct in that not all leo morphs are caused by recessive genes though -- some are line bred traits (ie. produced by selective breeding) such as tangerine, snow, jungle, stripe, carrot tail, high yellow, and others. When animals possessing these traits are bred to a normal, you generally get babies that are somewhere in between...

Isn't that last statement saying that they are co-dominant?

Martin

[SnowSnake]

lollllll MartinW I was going to answer to what Clownfishie said but you were faster than me!

Clownfishie- What you said is the exact definition of co-dominant genes. You selective breed to get the best of these co-dominant genes.

[Alicewave]

Clownfishie, thanks for the reply. I thought she was a jungle but I know she doesn't have the jungle tail thing. I was hoping I might get some babies that look like her! *fingers crossed*