Chromatin-Reduction And Tetrad-Formation In Pteridophytes is a scientific book written by Gary Nathan Calkins in 1897. The book focuses on the study of the chromatin-reduction and tetrad-formation processes in pteridophytes, which are a group of vascular plants that reproduce via spores. The author provides a detailed analysis of the reduction division of chromosomes during meiosis in pteridophytes, which leads to the formation of tetrads or groups...