Centriole |
absent |
0 |
|
Basic organization of the spindle pole |
spindle pole body a plaque or disc |
3 |
 |
Spindle pole body migration (per Heath, 1980, Int. Rev. Cytol. 64:1) |
migration during spindle formation |
1 |
 |
Metaphase nuclear envelope |
intact with small polar fenestrae plugged by the spindle pole bodies |
1 |
 |
Telophase nuclear envelope |
retention of complete nuclear envelope around the chromatin with median constriction/fragmentation |
0 |
 |
Perinuclear endoplasmic reticulum |
absent |
0 |
|
Spindle vesicles |
absent |
0 |
|
Central spindle |
absent |
0 |
 |
Metaphase plate |
absent |
0 |
 |
Spindle pole body cap |
absent |
0 |
 |
Interphase chromatin condensation |
absent |
0 |
|
Nucleolus behavior |
nucleolus is persistent throughout division |
3 |
 |
Transient intranuclear element at late interphase-prophase |
present within nucleus opposite the extranuclear spindle pole body |
1 |
 |