Question

All given statements are incorrect, except

• A. The DNA content at one pole of anaphase-I is half that at G1 phase.
  
• B. Congression occurs in metaphase.
• C. The centromeres split in both anaphase and anaphase-I.
• D. Cytokinesis in plants happens by the cell furrow method.

Answer 1

The correct option is B Congression occurs in metaphase.

A key step of cell division is the congression of chromosomes to the spindle equator which occurs during metaphase.

The DNA content becomes double when S phase is complete, and then become half again at each pole in anaphase. Centromeres split in anaphase and anaphase II, but not in anaphase I. Cytokinesis happens in plant cells by the cell plate method.