Artificial embryo twinning in a vertebrate (jan 1, 1902 – dec 31, 1902)
Description:
Spemann tried to figure out how to split two cells of an embryo much stickier than sea urchin cells. Spemann fashioned a tiny noose and tightened it between two cells of a salamander embryo until they separated. Each cell grew into an adult salamander. This experiment showed that embryos from a more-complex animal can also be “twinned” to form multiple identical organisms—but only up to a certain stage in development.Added to timeline:
Date:
jan 1, 1902
dec 31, 1902
~ 12 months