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Question about hypo and het genes!!!
- Thread starter stangugrl
- Start date
A snake that is homozygous for hypo A (is expressing Hypo) will be orange and redish in color and have reduced melanin, which typically means it will have much thinner borders around the saddles. I would suggest browsing/searching the photo gallery to get an idea for what different hypos look like.
If a snake is homozygous for hypo and another trait it can sometimes be difficult to tell if it's hypo. Hypo and Anery will give a ghost, which is usually detectable. Hypo and Caramel will make an amber. But things like Hypo + Anery + Amel (Hypo Snow) can be very difficult to know that it is homozygous for hypo without breeding trials.
There are few reliable ways to tell what hets a snake is carrying. There are some "traits" that can sometimes be useful. The characteristic head pattern of bloodreds is sometimes present in hets, but I wouldn't say that's all too reliable. I've seen quite few cases of Amels het for caramel that tended to have a more yellow coloration to them. Het motleys sometimes tend to look more motley than your average snake that isn't carrying a motley allele. I'm sure there are some others I'm forgetting. But the bottom line is that I don't think any of them are terribly reliable for predicting which snakes have which hets.
If a snake is homozygous for hypo and another trait it can sometimes be difficult to tell if it's hypo. Hypo and Anery will give a ghost, which is usually detectable. Hypo and Caramel will make an amber. But things like Hypo + Anery + Amel (Hypo Snow) can be very difficult to know that it is homozygous for hypo without breeding trials.
There are few reliable ways to tell what hets a snake is carrying. There are some "traits" that can sometimes be useful. The characteristic head pattern of bloodreds is sometimes present in hets, but I wouldn't say that's all too reliable. I've seen quite few cases of Amels het for caramel that tended to have a more yellow coloration to them. Het motleys sometimes tend to look more motley than your average snake that isn't carrying a motley allele. I'm sure there are some others I'm forgetting. But the bottom line is that I don't think any of them are terribly reliable for predicting which snakes have which hets.
Cegninedorf
Twang'em into trees!
stangugrl said:
Ahhh...good thing that I'm currently taking a Genetics & Evolution class (while brushing up on my high school biology!) right now for my middle school Science teaching endorsement, right?
I think what you mean is "homozygous" ("homo" = "same") and "heterozygous" ("hetero / het" = "different"). Simply put, if you are homozygous dominant or recessive for a trait, that means that your parents gave you one gene each that is the same. For example, if your mom has brown eyes (BB) and your dad has brown eyes (BB), and they each gave you the same gene (one each of B, making you have BB), meaning that you are homozygous dominant for brown eyes.
Or, let's say that your mom has brown eyes, but one of her parents had blue eyes, meaning that your mom's brown eyes are expressed, but she carries the blue gene, as well, making her Bb -- or heterozygous, meaning her genes for a trait are different, and the dominant is expressed.
(As brown is dominant over blue -- some traits are just dominant over the other trait; for example, having long eyelashes is dominant over short eyelashes, and being tall is dominant over being short...it's true! The trait that isn't dominant is called "recessive" and you need to have two of the recessive genes -- homozygous recessive -- for it to be expressed.)
And let's say the same is for your dad -- he has brown eyes (B), but his mom also had blue eyes, so he ends up carrying the blue eyes gene (b), too, so his eye color gene is also heterozygous (Bb). Your mom (Bb) and your dad (Bb) mate, so what color eyes will you get? Using a Punnett Square, the possibilites are that you could be 25% homozygous dominant (BB) for brown eyes, 50% heterozygous (Bb) for brown eyes but also carry the trait for blue eyes, and 25% homozygous recessive (bb) for blue eyes.
And, there really is no way physical way to tell if you or an animal is heterozygous for a trait unless you test breed it. You can guess the gene structure based upon the parents, but you really won't know. For example, the recessive trait -- with the eye color, the b for blue eyes -- isn't expressed, so you don't know it's there until you "breed" with someone who is homozygous for blue eyes (bb), improving your probability for blue eyes...but, if you already have brown eyes and are heterozygous for brown eyes (Bb), and as brown is dominant, you could still have children who are brown-eyed, despite the abundance of blue genes.
For those genetics fanatics out there, I hope that this is an acceptable explanation for you & that for you, stangugrl, this makes sense.