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Originally Posted by Jack B
Susan, thanks for the explanation. The anery A & B and hypomelanism questions are clearer to me now. It seems then that there are separate alleles that could reside at a specific locus which can cause different forms of anerythrism and the same with hypomelanism.
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As you'll see in my previous reply... no, the Anery alleles don't HAVE to exist on the same locus - and since they're not compatible (a Charcoal X an Anery = normal het charcoal and anery) they're probably not on the same locus at all.
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Using my snake as an example I would say she is a crimson corn, hypomelanistic Miami phase (het for anery). Her mother was crimson and her father was ghost ( I know this from the breeder). So I could probably assume that she is hypo A as a dominant trait and anery A as a recessive trait since her father was a ghost and not charcoal.I don't know if she's 100% het or what so the only way to determine that if I wanted to know would be to pair her with a snake 100% het anery or a shake that is anery. Is that right?
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I think this one might have gotten garbled.
Anerythristic and hypomelanistic are both recessive genes - you need two copies to produce either physical appearance, because a "not anery" or "not hypo" gene would make the snake look normal.
You might be confusing "dominant" with "homozygous" and "recessive" with "heterozygous".
"Homozygous" means that both genes of a pair are the same - EE (homozygous not anery, visually normal) and ee (visual anery) are both homozygous gene pairs.
"Heterozygous" means that both genes of a pair are different - Ee (visually normal, invisibly carrying anery AKA "het anery") is a heterozygous gene pair.
"Dominant" and "Recessive" refer to the visual expression of a gene pair. In the example above, an Ee snake will LOOK visually not-anery, because the "not-anery" gene "E" is dominant to the "anery" gene "e".
Hypo is not dominant to Anery simply because Hypo is part of a different gene pair than Anery is - if the pair "not-Anery"/Anery is expressed as E/e then "not-Hypo"/Hypo could be H/h
If Dad was a Ghost, he is homozygous Anerythristic A + homozygous Hypo.
If Mom was a Crimson, she was homozygous hypo, selectively bred for a miami-like appearance.
That means that you will get 100% hypo offspring (neither mom NOR dad can give a non-hypo gene to the offspring) and they will be 100% het anerythristic (because dad can't give a non-anery gene to the offspring). That means yours is definitely het for Anery (100% het) - she can't be anything but - and her genetics could be expressed as
hh Ee ... and that doesn't take into account any of the thousands of other gene pairs that make up the snake you have in your hands.