50% het?

[CH2O2]

Can somebody please explain what "50% het" means? Is it correct to say a animal is other than just plain het?

[Skittles1101]

It means there is a 50% chance the animal is het for a gene, as there's no way to tell what animal carries it unless it's visual or it's 100% het.

[CH2O2]

It means there is a 50% chance the animal is het for a gene, as there's no way to tell what animal carries it unless it's visual or it's 100% het.

Thanks. What other percentages are often used to describe the chance of the animal being het and in what cases would we use them?

[jason79]

66% chance from het to Het breeding 50% chance from het to normal 100% het from homozygous to anything.

[CH2O2]

66% chance from het to Het breeding 50% chance from het to normal 100% het from homozygous to anything.

Can you please explain how you arrive at these probabilities? i'm a little confused. Thanks

[jason79]

Het to normal half the babies statistically should be hets. Het to het 2 out of 3 should be hets. So thats where the 50% and 66% come from. all the hets look normal so there is no way to tell which are and which aren't so they call them 50% or 66% hets meaning that there is statistically a certain percent chance they will be hets, but there is also a chance they are not.

[Skittles1101]

Het x het breeding
Genetic Wizard 3.0 calculations by

In this you can't tell between the hets and the normals, therefore they are 66% het instead of selling a normal as a het, since there is an equal chance of being het.

Het x normal
Genetic Wizard 3.0 calculations by

In this breeding, only 50% because it's literally split in half.

Homo x normal
Genetic Wizard 3.0 calculations by

All are het, therfore they are 100% het even though they all look normal.

[Stewart_Reptiles]

An offspring is either het or he he is not in other way he carries the gene for the recesive morth or he does not.

When a homozygous animal is paired to a normal there is obviously no question that all the offsprings will carrry the recessive gene and therefore they are reffered to as het or 100% het, now the tricky part is when a het is paired to a normal or a het.

In both cases if you pair a het to a het or a het to a normal not all the normal looking offsprings will carry the gene for the recessive Morph, some will and some won't, however since it is impossible to distinguish which ones do and which one don't, all the normal looking offsprings are referred to as possible het either 66% or 50% depending on the original pairing.

This mean if you purchase a possible het from a het x het it has 66% chances to be a het and the only way to find out whether the animal you bought is a het or whether it is a normal will be by breeding the animal and proving or disproving him.

Same goes for 50% het.

[Royal Hijinx]

I agree with the above statements, and I see it like so:

Seems that people are dropping the percentage a lot nowadays and just list listing the animal as PH (possible het). I think that the percentage chance is good to know if you are choosing between two animals and all other things are equal.

The odds are per animal, not per clutch really, so the clutch could be all hets or zero hets. Each animal has the percentage chance of carrying the gene. I think some confusion arrises because we drop a word and say 66% het versus the full 66% possible het.

Really, the animal itself is het or not het, but knowing the odds can help in decision making during purchase as hets do not have 100% reliable markers for the gene.

[Slim]

I don't breed and I'm not a genetics guy, but can I assume that clutches with multiple possible sires complicate the Het math?