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Old 01-25-04, 02:16 PM   #1 (permalink)
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Breeding terms. Confirm please?

When an animal is described as being heterozygous for a trait, does that mean it is not that morph itself but is likely to produce offspring that are? If that is the case, what color will the snake in question most likely be?
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Old 01-25-04, 02:27 PM   #2 (permalink)
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Yes, a het animal carries the gene for a trait but does not show it in its appearance.

Simple recessive genes require two copies of the recessive gene to be present in order for the trait to appear. A snake that is het for a trait is one that carries one copy of the gene. It expresses the normal version of that gene (normal is typically dominant rather than recessive). Offspring from it have a 50% chance of getting the recessive vs the normal version of the gene.

It is not possible to say what color a het animal will be because it depends on other genes it expresses. You can have a normal appearing corn that is het for snow (het for both amel and anery) and it will have the normal corn colors. You can have an amel (albino) corn that is het for snow (het for anery in this case) and it will appear to be an amel.

hope that helps a bit - there are lots of genetic sites on snake morphs that can provide more detail,

mary v.
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Old 01-25-04, 02:32 PM   #3 (permalink)
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you've got the right idea. I wouldn't say "likely", more to the point is that it has the potential to produce... Typically it would look like a normal if only het for one trait. But with all the breeding projects and morphs, it may be another morph which is het for one or multiple other traits.
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