Anytime you take a species and mix it with another, the host species [the one with the embryo] generally does better, if you take a rat cell and put it into amouse blastocyst[an early embryo], the rat cells are at a disadvantage. Thats why, in general, chimerism is very low.

Ronald Parchem

Categorized in : Science

They do not have to compete to generate the pancreas, and then, these other species of cells can then contribute a large proportion of cells that generate a particular tissue or organ. Otherwise, thats not very likely.

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