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I stink at this and need help!

BRYAN139 Aug 18, 2004 03:42 PM

WHAT'S THE DIFFERENCE BETWEEN DOMINANT AND CODOMINANT AND HOW DO I TELL THE DIFFERENCE? I'M GUESSING DOMINANT YOU CAN SEE THE TRAIT? WHAT WOULD BE AN EXAMPLE OF A CODOMINANT TRAIT? AND IF I BREED 2 100% HETS I GET 50% HET, 25% NORMAL, AND 25% WHATEVER THEY WERE HET FOR, RIGHT? HOW DO YOU TELL THE HETS FROM THE NORMAL? YOU CAN USE ALBINO AS AN EXAMPLE, THEY WOULD LOOK IDENTICAL. DOES THAT MAKE 25% WHATEVER AND 75% 66% POSSIBLE HET?

Replies (5)

b1r2s Aug 24, 2004 11:31 AM

When you breed 2 100% hets, you get 25% displaying the trait, 50% hets, and 25% normals, in this case, all normal looking offspring are 66% hets.

You couldn't tell unless you A) did a genetic fingerprint of all and compared them, knowing what to look for, or B) bred the normals back to what trait they're potentially het for and see if you get any offspring that display the trait.

Dominant is a genetic phenotype that is displayed when there is 1 or 2 dominant aleliels present. Co-Dominant will display different phenotypes depending on weather there is 1 or 2 (usually referred to as "super" present.

We'll use D as an example. dd is recessive, Dd is dominant 1, DD is dominant 2, or "super"

There is incomplete dominance as well, in which 2 pheno types will "blend" depending on the level of dominance.

BRYAN139 Aug 24, 2004 05:51 PM

Yeah, so is there a place I can read up on this without needing a medical dictionary? I never thought I'd be wanting to learn those little damn squares they tried to teach me in high school on my own. Thanks for the help though, I'm just a little thick headed sometimes.

BRYAN139 Aug 24, 2004 05:54 PM

a site that will tell me what traits are what? Like what traits are dominant, which ones are recessive?

b1r2s Aug 24, 2004 11:16 PM

Kevin has taken some time to write up some excellent articles on genetics, for beginners and intermediate herpers.

It can be found at the following, under the Genetics Information secion toward the bottom.

http://www.newenglandreptile.com/care.html

There are some excellent basic genetics books in your local library. As to what morphs are what, that could take ages. I can't name any sources off the top of my head, but I'm pretty sure someone out there has as list of at least the basics. If you don't want to look, ask me in an email and I'll answer for you, I'm fairly familiar with all the genetics out there today.

Good luck and welcome to our addiction.
NERD genetics.

bryan139 Aug 25, 2004 08:25 AM

Thanks for the help and the website. I have no problem looking, I've been doing alot of it actually. The problem is everywhere I look it seems like you need a degree to know what's going on. I think I may have found a site last night that made it seem pretty simple. If it turns out to be any good I'll put the link on here for the next poor guy that has no clue what anybody is talking about. Thanks again.

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