Abstract
The morphological change and behavior of the C-banded bodies are investigated in the meristematic cell nuclei of Crepis vesicaria ssp. taraxacifolia in the course of organization of the chromosomes during the mitotic cycle. The chromatic materials of the chromosomes are classified into four categories according to the reaction of the C-banding staining, i.e. (1) positive throughout the mitotic cycle, (2) positive in both the interphase and prophase, (3) positive only in the interphase, and (4) negative throughout the mitotic cycle.