understanding hets

[fallen_angel]

How do you know the percentages for het. triats in offspring? I know the percentages of what morphs are produced, just not the het. percentages, please help with the following:

Mack Snow 100% het T-albino X Mack Snow 100% het. T-albino

Mack Snow 100% het T-albino X Mack Snow

Mack Snow 100% het T-albino X Patternless het. R-albino

Thanks in advance

 

[syntheticreality]

drawing punnet squares helps if you know how. If not, just google it.

the first would give all mack snowsand super snows, 50% het tremper, 25% tremper and 25% with no tremper at all

the second would be all mack snows and super snows, 50% het tremper, 50% no tremper at all

the last would give 50% mack snow, 50% het for tremper, 50% het for rainwater, all het patternless

 

[fallen_angel]

Okay, thanks, that helps a lot. I understand simple genetics and punet squares, I am just confused by people who say things like "66% het." or "33% het." for this or that... How do people get these percentages?

 

[Stevie]

If one of the parents is het., than the chance of the juvenile being het. is 50% since:

Aa x AA --> AA 50% and Aa 50%

If both parents are het., than the change of being a het. animal is 66%, since the homozygous animal is clear (the trait is showing):

Aa x Aa --> AA 25%, Aa 25%, aA 25% and aa 25%

You see that 2/3 of the not recessive homozygous animals is a het. so the change of being a het. is 66%! When this 66% het. animal is bred to another animal (not het.) the change of creating a het. 66/2 = 33% and so on...

Greets,

Stevie

 

[Mel&Keith]

Actually....

#1 would give you
25% Normal, 50% Mack Snow, 25% Super Snow
50% of those would be Albinos and 50% would not, all of the non-Albinos would be 66% poss. het Tremper Albino. When you breed (het recessive) to (het recessive) the het babies are 66% possible (het recessive).

#2 would give you
25% Normal, 50% Mack Snow, 25% Super Snow and all offspring would be 50% poss. het Tremper Albino

#3 would give you
50% Mack Snow het Patternless 50% poss. het Tremper and 50% possible het Rainwater
50% Normal het Patternless 50% poss. het Tremper and 50% possible het Rainwater (I would definitely not recommend doing this cross)



I think that's all right, I hate punnett squares so I'm trying to remember from the outcomes we've had. LOL Someone please correct any part that I messed up!

 

[Mel&Keith]

drawing punnet squares helps if you know how. If not, just google it.

the first would give all mack snowsand super snows, 50% het tremper, 25% tremper and 25% with no tremper at all

the second would be all mack snows and super snows, 50% het tremper, 50% no tremper at all

the last would give 50% mack snow, 50% het for tremper, 50% het for rainwater, all het patternless

I think you're thinking about Mack Snow x Super Snow, then you would get all MS and SS.

 

[fallen_angel]

Okay, that helps a lot more! Thanks everyone!

 

[fallen_angel]

#3 would give you
50% Mack Snow het Patternless 50% poss. het Tremper and 50% possible het Rainwater
50% Normal het Patternless 50% poss. het Tremper and 50% possible het Rainwater (I would definitely not recommend doing this cross)

We actually didn't realize that this cross wasn't all that great until it was too late But the female has already laid 3 clutches and is now mating with a different male (MS Patty)

 

[Stitch]

Mack Snow 100% het T-albino X Patternless het. R-albino

It's not a good idea to cross albino strains. If you do, you should let any prospective buyers know before selling to them.

 

[2.1SRR.YYC]

I’m going to try and break this down as simply as I can but genetics is a bit of a math lesson and I’m not a math teacher…

First off there are two things going on here. One is the outcome from breeding two geckos with known genetics and second is the breakdown of the offspring into phenotypes (visual) with % of possible heterozygous (not visible) traits or genes. The second part is what you are inquiring about.

Save yourself a lot of time on the first part and use www.advancedgeneticswizard.com to determine the outcome and skip the punnet square method.


The second part is determining the “nn% possible het for X trait” part. The best way to do this is with an example…

Het Snow, Het Blizzard x Het Snow, Het Blizzard (double het x double het)

This is what AGW (advanced genetics wizard) gives you…

6.25% WT
12.5% Het. Blizzard,
6.25% Homozygous Blizzard,
12.5% Het. Snow,
25% Het. Snow, Het. Blizzard,
12.5% Het. Snow, Homozygous Blizzard,
6.25% Homozygous Snow,
12.5% Homozygous Snow, Het. Blizzard,
6.25% Homozygous Snow, Homozygous Blizzard,



Break the results down by phenotype (visual genetics)…

Normal
6.25% WT
12.5% Het. Blizzard,

Blizzard
6.25% Homozygous Blizzard,
12.5% Het. Snow, Homozygous Blizzard,

Super Snow
6.25% Homozygous Snow,
12.5% Homozygous Snow, Het. Blizzard,

Snow
12.5% Het. Snow,
25% Het. Snow, Het. Blizzard,

Super Snow Blizzards
6.25% Homozygous Snow, Homozygous Blizzard,



Now calculate your “nn% possible het for X trait” part…let’s use the Super Snow as the example…

Add the two %’s…
6.25 + 12.5 = 18.75

Divide the % value of the het trait, 12.5 for het Blizzard in this case, by the sum value we just calculated…
12.5 / 18.75 = .66

The offspring, from the original pairing, that are visually Super Snow will be 66% possible het Blizzard. This is how they should be represented when sold. The other 33% will be straight up Super Snows. You will never know the actual heterozygous breakdown until the gecko is proven by breeding.

Hope this helps…

 

[fallen_angel]

It's not a good idea to cross albino strains. If you do, you should let any prospective buyers know before selling to them.

We plan to. I thought it would be kind of cool to have a gecko that was poss. het. for two diff. albinos, but that's just me. We tried to find matching albino strains (we had Tremper first), but ended up falling in love with two rainwater girls and the rest is history

 

[Stitch]

We plan to. I thought it would be kind of cool to have a gecko that was poss. het. for two diff. albinos, but that's just me.

If I were buying it just to be a pet then I'd be cool with it. But if I had plans to breed it, I would have to pass. It takes time and effort to prove out genes and most breeders won't want to do that unless it was a high end morph.

Just my .02.

 

[fallen_angel]

I see what you mean and that makes more sense. We most likely won't ever put that pair together again now that we have the right male for her