blas·to·gen·e·sis 
(blăs′tə-jĕnĭ-sĭs)
(blăs′tə-jĕnĭ-sĭs)n.
1. The transformation of small lymphocytes into larger cells that are capable of undergoing mitosis.
2. The development of an embryo during cleavage and germ layer formation.
3. Reproduction of an organism by budding.
blas′to·ge·netic (-jə-nĕtĭk), blas′to·genic (-jĕnĭk) adj.