First-ever demonstration of artificial embryo twinning (2 jan 1885 ano – 31 dez 1885 ano)

Descrição:

Dreisch showed that by shaking two-celled sea urchin embryos, it was possible to separate the cells. Once separated, each cell grew into a complete sea urchin. This showed that each cell has its own complete set of genetic instructions and can grow into a full organism.

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