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definition of het..?
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Anonymous post on May 10, 2005
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When an albino is bred to a normal, all the babies are het for albino right? How do you get the 50% hets?
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RE: definition of het..?
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by repti-rescue on May 11, 2005
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Hi, i am a herpetologist and live and work in south africa as a wildlife manager focussing alot on genetics, in particular ... reptiles.
"het" refers to hetrozygos . When to 2 members of the identical species have offspring, herpers often refer to them incorrectly as homozygous. they are however "thouroughbreds" and all babies will resemble the adults. If however you have the same species where on parent is albino and the other normal, all babies will look normal, but carry the genes of the albino, and are commonly referred to as het for albino.if 2 hets breed, in theory, 5o% of the offspring should be albino.
i hope this helps!!!
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RE: definition of het..?
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by Chance on May 14, 2005
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If using Mendelian genetics probabilities to try to make a best guess as to what percentage of the offspring will show the gene (ex: aa) when both parents are gene carriers (ex. Aa), only 25% will. The easiest way to picture this is to create a simple Punnet's square, which I won't try to describe here but it can be easily looked up on Google or whatever. This will show you the theoretical percentages of the offspring when any two parents are mated. Keep in mind though, genetics is never a concrete mathematical equation, so the percentages derived from the Punnet's square are actually only the odds for each offspring produced. For example, if the square shows that 1 in 4 of the offspring will show the trait, such as if you mated two het albino parents, what actually means is that each individual offspring they produce has a 1 in 4 probability of being albino. That being said, in theory, when mating two het albinos, the entire clutch could come out albino, no animals could come out albino, or anywhere in between. However, things generally work themselves out according to those percentages, so you tend to get about 25% of your clutch being albino.
Anyway, I suggest doing a search to find some pages that can explain all this stuff with graphical representations, as there's just only so much I can type on here without making things entirely too difficult to understand.
-Chance
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