50% het?

[CH2O2]

parent one has one recessive allele and one normal allele
parent two has one recessive allele and one normal allele
egg #1 has 4 possibilities
1. to receive both recessive alleles
2. to receive recessive allele from parent one and normal allele from parent two
3. to receive normal allele from parent one and recessive allele from parent two
4. both normal alleles

If the egg gets both recessive alleles it is easily identified.
If the egg gets only 1 recessive allele or both normal alleles, they cannot be distinguished form each other.
you have 3 options
1. to receive recessive allele from parent one and normal allele from parent two
2. to receive normal allele from parent one and recessive allele from parent two
3. both normal alleles

so the chance of the egg getting a recessive allele is 2/3 or 66%
repeat the above for each other egg in the clutch.

Now i understand. Thanks

[twistedtails]

Now i understand. Thanks

Hey CH202...I thought you were a genetic junkie? Are you just trying to see if people actually know how they come up with the 66% number or something? For you to go off and explain that a Pastel is an incomplete dominant in another thread and then post a thread like this has me wondering. Just curious.

[RandyRemington]

You might occasionally run into 33% or 25% chance hets. These where never well accepted terms and now that hets in general are more reasonable don't usually even get mentioned. They are the respective offspring of an untested 66% or 50% chance het to a normal. If you had a large number of such offspring from a large number of different 66% or 50% chance hets you would expect about 33% or 25% respectively to be hets. But for each clutch they are either near 0% or 50% depending on if the possible het parent hit their chance or not. The uncertainty of even having a chance due to this extra generation of removal from a know het is what makes naming 33% and 25% chance hets controversial.

I produced 5 pieds this last year from two 25% chance het pied girls bred to a 66% chance het male. However, since pied has co-dominant tendencies this wasn't nearly as lucky as it sounds (I would have been very surprised if any of these well markered possible hets hadn't proven).

[C&H Exotic Morphs]

Hey CH202...I thought you were a genetic junkie? Are you just trying to see if people actually know how they come up with the 66% number or something? For you to go off and explain that a Pastel is an incomplete dominant in another thread and then post a thread like this has me wondering. Just curious.

X2
It didn't make much sense to me either. How can someone come here "ripping" our community for using improper terminology related to genetics, but at the same time they don't even understand how they actually work?

[CH2O2]

Hey CH202...I thought you were a genetic junkie? Are you just trying to see if people actually know how they come up with the 66% number or something? For you to go off and explain that a Pastel is an incomplete dominant in another thread and then post a thread like this has me wondering. Just curious.

I'm not good at math.

[CH2O2]

X2
It didn't make much sense to me either. How can someone come here "ripping" our community for using improper terminology related to genetics, but at the same time they don't even understand how they actually work?

Why would you be confused? Math and biology are 2 different things. I did not know were the 66% came from. Some people took the time to explain. Now i understand.

[CH2O2]

You might occasionally run into 33% or 25% chance hets. These where never well accepted terms and now that hets in general are more reasonable don't usually even get mentioned. They are the respective offspring of an untested 66% or 50% chance het to a normal. If you had a large number of such offspring from a large number of different 66% or 50% chance hets you would expect about 33% or 25% respectively to be hets. But for each clutch they are either near 0% or 50% depending on if the possible het parent hit their chance or not. The uncertainty of even having a chance due to this extra generation of removal from a know het is what makes naming 33% and 25% chance hets controversial.

I produced 5 pieds this last year from two 25% chance het pied girls bred to a 66% chance het male. However, since pied has co-dominant tendencies this wasn't nearly as lucky as it sounds (I would have been very surprised if any of these well markered possible hets hadn't proven).

Yes, i see why the 33% or 25% are controversial. Did you ever encounter the argument that all unproven het snakes are 50% het?