Page 5: Diplonema
Diplonema in Mayapple. The six bivalents are clearly seen now that they have shortened and thicken after pachynema. The homologous chromosomes (large arrows) appear to be repelling each other—they remain attached at the chiasmata (singular—chiasma, small arrows). Chiasmata are the cytological evidence that crossing over at the molecular level has occurred.
