The fine structure of the kinetochore in meiotic cells of Tradescantia.

Observations on Tradescantia cells in the second meiotic division revealed distinct regions in meiotic chromosomes. These areas 1) consistently stain less dense than the chromosomes themselves, 2) have direct connections with the chromosomes at certain points, and 3) serve as focal points for spindle tubules during meiosis. These lighter staining regions are similar in character to kinetochores (centromeres) found in animal cells.