But it does provide usefull information. I've produced a bunch of 25% chance het females that are nearing maturity and I wouldn't trade them for "normals" because I know there is a reasonable chance some are hets since they had het grandfathers and homozygous great grandfathers.



An important thing to remember about 25% and 33% chance hets is that it's an all or nothing shot if they come from the same clutch or even the same possible het parent. With 50% and 66% chance hets your odds of having at least one het go up with the more animals you get and contrary to what many claim it doesn't mater if they come from the same clutch or different clutches (as long as there is no marker to make the pick not random). With sibling 25% and 33% chance hets it all depends on if the 50% or 66% parent (father usually) hit their chance. If they didn't, it doesn't mater how many of their offspring you get from a normal, you aren't going to get a het. The 25% and 33% chances really only come from a large sample size from a large number of 50% and 66% hets respectively.



Also, I only use the terms 25% chance het and 33% chance het for the offspring of 50% chance het and 66% chance hets to normals. I see in this thread where 50% chance het X 50% chance het have been brought in but I think that's a different chance and Paul Hollander covers that in his post.

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