corn snake outcome

[AndrewBobDrew]

Hey there

Well I have just invested in a new pair of corns, they are normals but het for Anery, Hypo, Amel, stripe, motley I think ( theri parents were a ghost motley and striped albino). What will I get as babies and how much would they be worth?

thanks

[vanderkm]

You will get an absolute treasure trove of morphs from these parents. If you run a google search for 'Micks progeny predictor' you can download a free ware program that will allow you to do the calculations for yourself - and it is a fun one to play with.

If one parent was striped and one was motley, you should be seeing the expression of that pattern (or some variation of it) in the offspring. These are referred to as striped/motley and those two genes are inherited in a rather co-dominant way, not as single recessives. If your snakes both appear to have normal saddle patterns, then the parent information on them is not accurate.

Overall, about 40% of the progeny will be striped, motley or striped/motley normal color with numerous hets - Canadian value of about $45-65 depending on pattern

Of the other half - there will be about 15% either striped, motley or striped motely in each of hypo, amel and anery again with various hets - Canadian value of $65-125 depending on pattern.

There are low probabilities (5%) of ghost, snow and hypo amel (not distinguishable from regular ame) with stirped, motley or striped/motley pattern - Canadian value really guessing here because these are not common - $90-200 if you could get someone who really wanted one - especially the ghost with full stripe pattern.

There is a very low probability (1.5%) of hypo snow with striped motley - Cdn $ same as striped snow - cannot visually distinguish them.

Will sure be fun when those eggs hatch out though - even though the odds are very low for some of the more exciting combinations, it is great when you get some suprises.

Congrats on the new ones,

mary v.

[wyz]

I have these files here for ya.

Go at the bottom of the page, click on "fichier 1" and "fichier2"

http://www.wyzza.ca/page_aide

[Invictus]

Mary, if motley and stripe are inherited co-dominantly, why you see "het for stripe" and "het motley" all the time? Or am I misunderstanding you?

[vanderkm]

Sorry Ken - my mistake - the striped and motley genes are not co-dominant. I slipped into some of the incorrect jargon that has been happening on the cornsnake list lately around another set of genes (ultra and amel).

You are correct that this is not a co-dominant gene. A co-dominant, as I understand it, would give a different appearance when it is present in a homozygous state relative to the heterozygous state - like the morphs superpastel (homozygous co-dominant) and pastel (heterozygous - one pastel and one normal gene) in ball pythons - right??

There has been a lot of chatting about the ultra-hypo and amel genes in corns and how breeding trials this year show that they appear to be alleles on the same gene - and this has been referred to as co-dominant (sort of in the sense of neither allele being dominant to the other). The comparison has been make a lot of times with striped/motley, and I slipped into that phrase - but it is incorrect.

You are right - both motley and stripe are recessive to the normal saddled appearance - so normal animals can be het for striped or motley - they show no indication of whether they carry those genes when they are het. The ultra-hypo and amel genes appear to work the same way

Where it gets weird is when you breed striped to motley - because neither is recessive to the other - when they are present together they form striped/motley - which is a sort of intermediate pattern - with ranges from appearing completely like a striped snake, to appearing almost completely motley - so you cannot always establish that these crosses are striped/motleys based on what they look like.

Thanks for catching that - hope my excessive explanation hasn't made things worse!!

mary v.

[Invictus]

We actually have a striped/motley amel here. We got it from Mark IsBell (of course), and it's showing stripes. We're going to breed it to my unrelated striped male and see what we get - but the two DO seem to be allelic with each other, and breeding stripe to motley does create a striped aberrancy. In the words of Rich Z in an email I got from him "Things aren't simple with corn genetics anymore......"

[vanderkm]

No kidding the corn genetics aren't simple any more - if they ever were!! Have you been following the ultra hypo discussions?? Talk about complicated!

I have a couple of the striped motely amels from Mark - very pretty babies - mine both appear striped as well. Will be interesting to see what they produce when adults.

mary v.

[Invictus]

Mary,what I was researching was what happens when you have Anery A's that are het for lavender or opal. I can't breed my opal hets together because apparently, Aneries can produce lavenders, UNLESS they are also het Amel, in which case the Anery will mask the lavender.....

HUH?!?!?!?!

Exactly.