Genetics questions...

[Phoebeq]

Ok, so I am really not sure if this has been covered before, but I have a question or two. I have tried to use that genetics program, but it just tells me invalid argument... Anyway, I am not completely clear on the genetics of corn snakes. If you breed a normal with another morph, will they always come out as normals that are het for another trait or will they show the other traits too? Is there a site that can tell me which genes are dominant and which are recessive? I can do horse genetics pretty easily, but there are soooooo many corn snakes genes...ugh. Anyway, if someone can give me a little insight on this, I would greatly appreciate it Thanks!

Katy

 

[Sharon]

Most corn genes are recessive, but this site is beyond price when it comes to learning all of them -> Ian's Vivarium
The only ones that are not recessive I believe are:
Ultra and amel are codominant
Tessera is dominant

If you breed a normal to an animal homozygous for a gene will show up only if the normal carries (is heterozygous for) that gene also.

 

[Phoebeq]

Thanks for the site. I am checking it out now

 

[ZoologyGirl]

Ok, so I am really not sure if this has been covered before, but I have a question or two. I have tried to use that genetics program, but it just tells me invalid argument... Anyway, I am not completely clear on the genetics of corn snakes. If you breed a normal with another morph, will they always come out as normals that are het for another trait or will they show the other traits too? Is there a site that can tell me which genes are dominant and which are recessive? I can do horse genetics pretty easily, but there are soooooo many corn snakes genes...ugh. Anyway, if someone can give me a little insight on this, I would greatly appreciate it Thanks!

Katy

A quick hint for traits that are governed by recessive genes...

Homozygous dominant = AA
Heterozygous = Aa
Homozygous recessive = aa

In order for a trait to show, the animal must be homozygous recessive...otherwise the wild type (normal) trait will show.

So if you have an amel het anery--the snake is homozygous recessive for amel (aa) and heterozygous for anery (Aa). Becaues of this, the snake will look amel, but the anery will not affect the look.

If you are breeding for a specific trait, both parents must have at least 1 recessive copy of that trait (i.e. it must either be homozygous recessive for that trait, or heterozygous).

For instance...
If you want an amel...both parents must either be an amel, or het amel (or one of each...)
If you want anerys...both parents must either be anery or het anery
If you want butters (amel + caramel)....then both parents must have the amel trait, and the caramel trait, either in homozygous recessive or heterozygous form

Therefore, if your normal is not heterozygous for anything, then it can only create normals in the f1 generation. If, for example, it is het for amel...then you could breed it to an amel (or another snake het for amel) and you could get some amels in the f1 clutch.

 

[Phoebeq]

Thanks! Ok, so say I wanted to breed two bloodreds. I would get mostly bloodreds, unless there were some het traits that both of the parents carried?

 

[ZoologyGirl]

Thanks! Ok, so say I wanted to breed two bloodreds. I would get mostly bloodreds, unless there were some het traits that both of the parents carried?

yep, sounds right

 

[Phoebeq]

Ok, thanks for all the help I'm still learning, but it is becoming more clear now lol

 

[Sharon]

If you bred two bloodreds, you would get all bloodreds. If there were mutual hets, those genes might show up along with the bloodred gene.