Hi Kanayla:

A basic rodent characteristic is a bifurcated uterus. Thus, on average half of the 
litter will be from one "horn" or portion and the other half from the other horn. So, 
with a normal size [in terms of numbers] litter, it is quite possible for the embryos 
in a particular horn to come from separate ova or from the same ova that splits soon 
after fertilization. However, the probability of identical twins, triplets, etc, 
occurring is not known and, as mentioned in other posts, somewhat impractical to 
determine via DNA testing.

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On Fri, 17 Mar 2000 11:21:07   Kanayla Tyler wrote:
>I thought, anatomically, that gerbils (or rodents
>altogether) are unable to have "twins" so to speak.
>
>Kanayla
>
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