Fig. 13

A. Divided cell in meiosis I and II; B. Normal anaphase I; C. Anaphase I with lagging chromosome arrow; D. Metaphase I with lagging chromosome and fragment arrow E. Diad pollen grain arrangements; F. Normal Microspore tetrad (isobilateral); G. Normal Microspore tetrad (Liner and Decussate) H. Tetrad release immature PG arrowhead (Tetrahedral); I. Two cells from tetrad lose cytoplasmic granules arrows; J. All cells formed tetrad lose cytoplasmic granules; K. cytoplasmic granules outside tetrad arrows; L. immature PGs; M. Mature Fertile PGs (reduce) arrow and immature arrowhead; N. Sterile PGs; O. Mature fertile 2n pollen grain arrow (unreduced)