Centriole |
absent |
0 |
|
Spindle pole body form, interphase-prophase |
a globoid |
5 |
|
Spindle pole body form, metaphase-anaphase |
a globoid that expands by more than 100% of its interphase-prophase size directly connected to spindle |
7 |
|
Metaphase nuclear envelope |
loose polar fenestrae, including extensions of nuclear envelope into the cytoplasm at the spindle pole, but mainly intact |
2 |
|
Telophase nuclear envelope |
retention of complete nuclear envelope around the chromatin with median constriction/fragmentation |
0 |
|
Perinuclear endoplasmic reticulum |
absent |
0 |
|
Central spindle |
present |
1 |
|
Spindle pole body cap |
continuous with the nuclear envelope |
1 |
|
Nucleolus behavior |
nucleolus discarded between prophase and metaphase |
1 |
|
Transient intranuclear element at late interphase-prophase |
present within nucleus opposite the extranuclear spindle pole body |
1 |
|