[Palladin]

Strange! I never heard of such a thing, but I guess it's possible. Fused twins. So the twin that did not develop lives on in her sister's children?

[HamiltonJay]

From a DNA perspective you are correct.

[Ichneumon]

Fused twins. So the twin that did not develop lives on in her sister's children?

In a sense, neither twin "did not develop" -- they *both* developed, just as different "stripes" of tissue in the resulting adult.

[sweetliberty]

"the twin that did not develop lives on in her sister's children?"

Pretty amazing isn't it? An unborn person whose DNA is still preserved. Makes you wonder. DNA technology is fairly new. Who knows how often it may have actually occurred. Most people would have never had reason to know, and until recently it would have been impossible to tell anyway.