In prophase II of meiosis, which event occurs?

• A. Homologous chromosomes pair (synapsis) and crossing over occurs between non-sister chromatids.
• B. Sister chromatids separate and move to opposite poles of the cell.
• C. Two haploid nuclei form and cytokinesis produces four genetically identical diploid cells.
• D. Chromosomes (each still consisting of two sister chromatids) re-condense, the nuclear envelope breaks down (if re-formed), and a new spindle forms in each haploid cell.

Answer: (D)