Biology 9700 · AS & A Level · Chromosome behaviour in mitosis

Chromosome behaviour in mitosis — practice question

A microscope was used to examine stained onion cells that were undergoing mitosis. Which row gives the correct statement for mitosis in plant cells?

  • Aprophase: centrioles visible; metaphase: chromosomes pair up at the equator; anaphase: two telomeres are visible on each chromatid; telophase: two nuclear membranes form
  • Bprophase: centromeres present; metaphase: chromosomes align at the equator; anaphase: chromosomes replicate to form chromatids; telophase: centrioles disappear
  • Cprophase: each chromosome is visible as two chromatids; metaphase: centromeres attach to spindle fibres; anaphase: chromatids separate and migrate to opposite poles; telophase: chromosomes decondense
  • Dprophase: spindle fibres formed by centrioles; metaphase: centromeres attach to spindle fibres; anaphase: chromatids are pulled apart by centrioles; telophase: spindle fibres form new nuclear membranes

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