Question

Place the following events in the correct order, beginning with a cell that has just been produced by mitosis and is in G1 of the cell cycle.

Try to think this through logically, but feel free to check your work with your book before submitting your answer.

  

cell passes G1 checkpoint     

cell passes G2 checkpoint      

chromosomes align at center of cell   

chromosomes condense and spindle begins to form

chromosomes decondense, nuclear envelope re-forms, mitotic spindle disassembles

cytoplasm is fully divided, producing two separate cells   

DNA replicated   

nuclear envelope comes apart  

sister chromatids separate and move to opposite ends of cell  

spindle connects to chromosomes

Answer 1

1. cell passes G1 checkpoint

2. DNA replicated

3. cell passes G2 checkpoint

4. Chromosomes condense and spindle begins to form

5. nuclear envelope comes apart  

6. spindle connects to chromosomes

7. chromosomes align at center of cell  

8. Sister chromatids separate and move to opposite ends of cell

9. chromosomes decondense, nuclear envelope re-forms, mitotic spindle disassembles

10. cytoplasm is fully divided, producing two separate cells