BioCoach Activity

Concept 8: Telophase

Chromosome sets assemble at opposite poles, a nuclear envelope reforms around each set, and cytokinesis (division of the cytoplasm) usually follows.

To see telophase animated, click the image.

  • The chromosomes assemble in sets at the two poles.
  • The chromosomes begin to uncoil and eventually assume the extended state characteristic of interphase.
  • A nuclear envelope reforms around each chromosome set, the spindle disappears, and the nucleolus reforms. Nuclear division by mitosis is complete at this point.
  • Cytokinesis, the division of the cytoplasm, usually is in progress before nuclear division is complete. In animal cells, cytokinesis involves the formation of a cleavage furrow resulting in the pinching of the cell into two.
  • In some specialized cases, such as in the development of the Drosophila embryo, nuclear division occurs without being followed by cytokinesis.