and transplanted into eggs whose nuclei had been removed. A small number of these eggs developed into
normal frogs. This suggests that the nuclei of tadpole intestinal cells
(1) can undergo meiosis and form gametes
(2) contain all of the genetic information needed for frog development
(3) will undergo mitosis and form a new zygote
(4) fused with the frog genes already present in the zygotes
