Boa Genetics and 'Outcomes' - Albino, Anery & Hypo - Hets, Visuals and Supers

[mikerichards]

Cool yes, i was just using sunglow as an example cos it was only technically double het but called triple het as its showing a trait, but i kinda understand what you mean.
Thanks for you time and patience, i am sure i will be back though!!!

Mike

[bladeblaster]

yeah sunglows a good one

its called a double het sunglow, but technically it only carrying one het, so it should just be het sunglow? errr no technically its a hypo het albino. Clear as mud ain't it

Stick at it mate its just terminology really.

[mikerichards]

Originally Posted by bladeblaster

yeah sunglows a good one

its called a double het sunglow, but technically it only carrying one het, so it should just be het sunglow? errr no technically its a hypo het albino. Clear as mud ain't it

Stick at it mate its just terminology really.

Lol, i understand it cant be het sunglow, as its not technically a morph.
I just wasnt aware that a double het was actually one showing and one recessed.

Now i know, it makes life a lot easier. Thanks

[paulh]

Originally Posted by mikerichards

ok cool.
So, on the list above, one set of offspring are hypo het albino, double het sunglow.
is the double het reffering to the hypo and the albino? as if its showing surely its not a het, although it is in a way, being that both arepassed on.
Or is it double het because they are both traits and are both passed?

This is standard genetics:
All gene pairs are either homozygous or heterozygous. A gene pair is homozygous if the two genes are the same. A gene pair is heterozygous if the two genes are not the same.

Note that there is nothing in these definitions about what an animal with a heterozygous gene pair looks like. That is in the definitions of dominant, recessive, and codominant mutant genes.

A hypo boa has a hypo mutant gene paired with a normal gene. The two genes are not the same, so the gene pair is heterozygous. And by extension, the snake that has that gene pair is also heterozygous. Hypo in herper genetics lingo is heterozygous hypo in standard genetics.

Herpers got used to all heterozygous animals having a recessive mutant gene paired with a normal gene and looking normal. Many have still not adjusted to dominant mutants (like hypo) in a gene pair.

A double het has two heterozygous gene pairs. A triple het has three heterozygous gene pairs. A quad het has 4 heterozygous gene pairs. And so on.

I have a ringneck dove that has six heterozygous gene pairs. One gene pair has a codominant mutant gene paired with a normal gene. The second gene pair has a different codominant mutant gene paired with its normal gene. Three more gene pairs have recessive mutant genes paired with normal genes. And the sixth gene pair has two different mutant genes (both of which are recessive to the normal gene).

[Blackecho]

Nice explanation Paul.

[bladeblaster]

yep explained much better then me

I had left out about hypo being het as well even though it was visual to simplify the explanation, but I suppose that just more misinformation, which adds to the confusion.

Having said that you 'could' have a homozygous hypo het albino, that was still refered to as a DH Sunglow?

[mikerichards]

Cool thanks, i understand what hetro and homozygous mean, and i understand that a snake can be het for many different things, it was the triple het for the same thing i didnt understand. However, i do now!! Thanks very much for the time and effort, all hopefully absorbed and noted!! thanks

[BecciBoo]

Originally Posted by mikerichards

Cool thanks, i understand what hetro and homozygous mean, and i understand that a snake can be het for many different things, it was the triple het for the same thing i didnt understand. However, i do now!! Thanks very much for the time and effort, all hopefully absorbed and noted!! thanks

Try this: J'n'B Boas - Information

I'm not great at genetics, its Jakes job to do all the working out but this is the basics

[ndixon7868]

great thread guys, nice web site too, look forward to seeing those Dwarf Albino Jungles next year

[paulh]

A chart for all the possible matings involving three gene pairs would have 216 matings. I hate to see a project left only a quarter done, but I had no intention of completing it manually. On the other hand, once a computer is programmed to do something, it can do a job faster and more accurately than a human. And a program for boa constrictors can be modified to do leopard geckos or corn snakes. So here is a link to both the program's output for boas and its source code (in the Python language, which can run on Macs, PCs, Linux boxes, and others):

three loci

The file is freely distributable, so save it if you want it. My web access may be much more limited in a few months. If so, that file will go away.