Quick question on het percentage, i'm keeping a detailed log

Just bought a blood cross and the parents' info are blood 100% het bell x red stripe 66% het bell, eclipse (radar)
Quite confused on 100% x 66% = ? Already know the eclipse side is 33% what about the bell side? 61%?

TIA:main_thumbsup:

100% het means that the gecko is definitely het for the trait.
The het percentage otherwise is based on the punnett square, which is a way to determine all the possible outcomes for a trait. So, if two geckos each have a dominant trait ("A") and a recessive trait ("a") and they breed, the offspring will have one of the following combinations, since it gets one of these genes from each parent:
aa, Aa,aA,AA. The "aa" gecko will express the trait (in your case, an "aa" gecko would look like a Bell albino). The AA gecko will not have any genes for the recessive trait, and the other two (Aa, aA) will have one gene for the trait (i.e. be "het" for that trait). The problem is, that the AA,aA and Aa geckos will all look the same and there's no way to know which ones have the recessive trait. So, out of 4 possible outcomes, one is visibly recessive and 2 out of the other 3 (or 2/3 which =66%) will also have a recessive gene. Each gecko either has the gene or doesn't have it, but statistically, it has a 66% chance of having it. Other breeding combinations may result in offspring with a 50% chance of having the gene.

In the case of your gecko, whatever comes before the "x" is the genetic description for one of the parents and what comes after the "x" is the genetic description for the other parent. So your gecko is the product of:

One parent that is blood 100% het bell
and
one parent that is red stripe 66% het bell, eclipse (radar)

I have no idea if this means that the other parent has the eclipse trait or also has a 66% chance of having the eclipse trait; it's not clear from the description.
Note that the traits do not add up to 100%, so there is no 33% for eclipse. Each percentage is just the statistical chance of a trait being present.

Show us a picture of your gecko and I may be able to provide more info.

Aliza

Thanks! Very informative!

Does your gecko have solid black eyes or greenish eyes with a black pupil? If it has solid black eyes, it is an eclipse. If not, I'm guessing it has a 66% chance of having an eclipse gene. Your gecko could have a gene for Bell albino. The only way to tell is to breed it to a Bell albino, or to a gecko that definitely is het for Bell Albino. If you get Bell albino offspring, the gecko is het for Bell. If not, it's not. Nice looking gecko no matter what its genetics are!

Aliza

acpart said:

Does your gecko have solid black eyes or greenish eyes with a black pupil? If it has solid black eyes, it is an eclipse. If not, I'm guessing it has a 66% chance of having an eclipse gene. Your gecko could have a gene for Bell albino. The only way to tell is to breed it to a Bell albino, or to a gecko that definitely is het for Bell Albino. If you get Bell albino offspring, the gecko is het for Bell. If not, it's not. Nice looking gecko no matter what its genetics are!

Aliza

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He's just a regular blood tangerine Regular banded pattern eclipses are really really rare in tangerines afaik -i haven't seen one yet, I've only seen them in snows. I have a bit of ocd and i can't do the math for the parents' infos - 100% het bell x 66% het radar, i also believe in non het or sure het regardless of percentage but ocd kicks in when i'm making my breeding logs. Sorry.

http://www.glidernursery.com/percent-het-chart.html

This might help. Not sure how to calculate manually... Going to investigate.

indyana said:

http://www.glidernursery.com/percent-het-chart.html

This might help. Not sure how to calculate manually... Going to investigate.

Click to expand...

AWESOME!! is this the same with leopard geckos? 100 x 66 = 66.5 Thanks alot!!

Yes. All that line of the chart means is that if you have one animal that's definitely (i.e. 100%) het for a trait, and you pair it with an animal that's got a 66% chance (technically it's 66 and 2/3% or 66.6666 . . . %) of being het, then (obviously) the offspring has a 66% chance of being het as well.

Aliza

acpart said:

Yes. All that line of the chart means is that if you have one animal that's definitely (i.e. 100%) het for a trait, and you pair it with an animal that's got a 66% chance (technically it's 66 and 2/3% or 66.6666 . . . %) of being het, then (obviously) the offspring has a 66% chance of being het as well.

Aliza

Click to expand...

Thanks for the help guys! I was really confused