BiologyCell Biology

Comparing Chromosome Separation in Bacteria and Eukaryotes: Mastering Biology Answers

Both cell types copy and partition DNA before division, but the introductory bacterial model begins segregation near the replication origin, while eukaryotic mitosis uses condensed sister chromatids, centromeres, kinetochores, and a spindle.

Question

Sort each statement into **Bacteria only**, **Eukaryotes only**, or **Both bacteria and eukaryotes**.- Chromosomes replicate before cell division.- Replicated chromosomes separate by attaching to some other structural feature of the cell.- Chromosome separation begins at the origin of replication.- Duplicated chromosomes condense before separation.- The nuclear envelope fragments, permitting chromosome separation.- The two duplicated chromosome copies are attached at their centromeres before separation.

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Evidence boundary

This classification uses the Mastering Biology introductory model of a typical bacterium and open eukaryotic mitosis. Bacterial segregation mechanisms vary among species, and some eukaryotes undergo closed mitosis without complete nuclear-envelope breakdown.