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Breeding and Genetics

krresellers Aug 15, 2007 12:55 AM

Is there a chart or a doc that gives a easy understanding of breeding hets and genetics.

If I have a dh Snow mate with a dh Snow

What would be the outcome?

Is there a basic chart I can show my kids etc...

thanks again

Replies (2)

exitwounds Aug 15, 2007 07:30 AM

if your breeding basic simple recessive's it would be easily represented off of a simple punit square with the het snow being Aab crossed with Aab as the other het it was bred with. if you line it up it comes out easy with the ratio and odds you can come out with as albino, ani, snow and normal outcomes respectively

toddbecker Aug 15, 2007 12:19 PM

The first responder is correct in stating that if dealing with simple recessive (which we are) then a punnett square will predict the outcome. however, if you do not know basic genetics then you probably do not know who Reginald Punnett is and thus do not know about his punnett square. So I will break down the offspring for you.
A dh snow bred to a dh snow would (on average) produce the following:
6.25% would be snow
12.5% would be albino het anery
6.25% wuld be albino
12,5% would be anery het albino
6.25% would be het anery
25% would dh snow
12.5 % would be het anery
12.5% would be het albino
and 6.25% would be normal without any trait

Couple key things to remember is that you are unable to differentiate the normals from the ones that are het albino or het anery so they would have to be classified as 66% possible dh snow. Same for the albinos and the anerys. you can tell which ones are het for the other trait so they two would have to be identified as 66% possble het. The last thing to remember about when figuring probability of offspring is that these are not the odds as they apply to the entire clutch or litter. Technically these are the odds that pertain to each specific egg or embryo. For example in this scenerio each baby has a 6.25% chance of being snow. In all actuality it usually comes out to accurately represent the entire litter but it won't always and the smaller the litter the more of a difference you could see. When dealling with Balls it takes some people years and years of breeding to hit the 1 in 16 odds of a DH to DH breeding while others hit it on their first try. Hope this makes a little sense and I didn;t ramble on to much. Todd

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