Vertebrate clones

Clone is Greek for "twig", harkening to plant grafting. The first clone of a vertebrate was achieved using nuclear transplantation in frogs. Amphibian ova, unlike bird and reptile eggs, are unprotected by a shell and are easier to work with. This marked a significant advancement in genetics and cloning research.
 John B. Gurdon England 1967 Vertebrate clones

Clone is Greek for "twig", harkening to plant grafting. The first clone of a vertebrate was achieved using nuclear transplantation in frogs. Amphibian ova, unlike bird and reptile eggs, are unprotected by a shell and are easier to work with. This marked a significant advancement in genetics and cloning research.