Genetics

[kjay]

i have been reading alot on genetics, i was wondering, if i have this correct, the hatchlings i have now, could "possibley" be carrying a normal gene each and a albino gene for arguement sakes, == NA male & NA female which could yeild from 4 eggs

1 NN
2 NA
1 AA

i have no clue what my hatchlings even are but is this roughly how it works, if they had those genes from parents

[CamHanna]

Yes, that's correct, though it's less confusing to figure out if you use the same letter for different alleles of the same trait. So the dominant allele of the gene that causes albinism (Normal) could be 'A', and the ressesive form would then be 'a'. This Just makes things much less confusing when you're working with multiple traites in the same square.

The possible alelles from each parent (if they're both het albinos) are either 'A' or 'a'

The square would go...

--A--a
A AA Aa
a Aa aa

So your offspring are 25% Normal, 50% hets and 25% albinos.

Hope this helped.

[hhw]

Originally posted by kjay
1 NN
2 NA
1 AA

If both parents were het for albino, that would be what you get.

[justinO]

Jessy likes genetics!!!!!

Yes, like hhw said, if the ones you have are 100% het for albino. That means that one of the parents would be the actual morph (an albino) and bred to a normal. when you get into 50 or 66% hets, that's much more messy.

So basically, if say the girl had 4 eggs, the babies *should* be (if you are lucky)
1 Normal
2 50% hets
1 Albino

BUT, the hets and normals will look the same, so you won't actually know if any or all carry the gene.

Tada!

Jessy

[CamHanna]

Originally posted by JustinO
1 Normal
2 50% hets
1 Albino

No, no, no. If both parents are hets then you should get 1 Norm, 2 Hets and 1 albino. The norm and hets look the same so you of your normal looking snakes 2/3 are hets, so you call all your normal looking animals 66% hets.

[kjay]

so the way i had it is right, the na standing for normal and albino gene meaning hets, is that correct, thanks everyone,

i am just trying to learn all i can to treat my animals with all due respect and good treatment they deserve and know how they got here not just own them. thanks

[justinO]

Originally posted by CamHanna
No, no, no. If both parents are hets then you should get 1 Norm, 2 Hets and 1 albino. The norm and hets look the same so you of your normal looking snakes 2/3 are hets, so you call all your normal looking animals 66% hets.

that's exactly what i said, 1 normal, 2 hets, 1 albino..... it's right in your quote..... you said no no no then repeated my exact post.... heh

the hets are actually 50%, but you don't know which are, so they are 66%. I didn't add that to the end.

Jessy

[kjay]

i didnt write no no no , somelese did,, lol

[justinO]

yes, it says originally posted by camhana.....
everyone needs to read the post more carefully, or i'm doing something wrong in my posting on this particual board!

[vanderkm]

Jessie - what was wrong was that you said the hets were 50% hets - they aren't. When you do the calculations you are looking at the gene types - 2/4 will be het (so 50% of the clutch will be het, but every het is 100% het - by definition the hets have both the gene for albino and normal). An animal is either het or not het - not 50% het.

You are right in that you cannot tell which 2 of any 3 normal appearing snakes are the ones that are het, so you have to refer to all normal appearing snakes in the clutch as 66% hets (they each have a 2/3 chance of being a het and 1/3 chance of being completely normal).

hope that clarifies it,

mary v.

[CamHanna]

Thank You Mary.

I thought my post made sense at the time but looking back it really didn't say much. You said exactly what I was trying to (and a little bit more).

Cam

PS- 50% Hets come from het x norm breedings

--A--a
A AA Aa
A AA Aa

50% of the normal looking offspring are heterozygous.

Edit: Just fixed my grammer.