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Non-Medelian Genetics

M

Mike B

New member
Hi everyone. After observing this forum for a couple of months I decided to finally make my first post. Just so you know I am the proud owner of one plain ole' normal corn(named Macaroni for some reason that is escaping me now). I have been noticing that the morphs of corn snakes, for the most part, seem to follow simple Medelian genetic pathways. I was wondering if there are any morphs, patterns, colors, etc, that are governed by non-Medelian genetic pathways (codominance, incomplete dominance, sex linkage, etc.) I guess the only one I know of so far is bloodred which seems to be governed by codominance (thanks to SerpWidget's excellent site). Any input will be greatly appreciated. By the way, I'd like to thank all of the "regulars" of this forum for posting so much helpful info (which has really helped me through my early stages of corn snake ownership and made it a real pleasure).
-Mike B
 
Quite a few, actually. :)

Miami, Okeetee, candycane, and sunglow are all governed by something more than "a gene."

The heterozygous state of Motley/Striped in corns seems to be able to produce a huge array of pattern effects.

SilverQueen is still unknown. The mechanism behind the ultra-red coloration on the "pure" bloodreds is also a mystery at this point.

Some will tell you that hets for Caramel and (at least certain lines of Hypo) can be visually distinguished from their non-het siblings. (I don't have the experience with these to say one way or another if it's true, but it would suggest incomplete dominance.)

Hypo itself seems to be a big mess. I don't want to even go there right now because I haven't caught up with all, or even much of, the data that's out there.

And of course the new thing that Frank Pinello hatched this year, looks like it might be a piebald-like trait, but who knows if it will turn out to be genetic. (I hope it does, wheee!)

Tons of fun left in the corn world. :)
 
The Zigzag pattern is also confusing. You can breed well- zigzaged parents and get non-zigzaged offspring, and breed a zigzag to an unrelated, non-zigzag and get some zigzag offspring. The pic is a resulting example of a zigzag bred to a non-zigzag.
 
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