5.1 Mitosis

Why does cell division take place in single-celled organisms?

• for the organisms to grow

• to reproduce and pass on genetic information

• to enable the organisms to heal injured tissues

• to make specialized cells for different functions

Which of these lists presents the stages of the cell cycle in the correct order?

• interphase, mitosis, cytokinesis

• cytokinesis, mitosis, interphase

• mitosis, interphase, cytokinesis

• interphase, cytokinesis, mitosis

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NGSS.HS-LS1-4

Which of these statements most likely describes what happens if DNA is not duplicated during interphase?

• The new cells would be more numerous.

• The new cells would have too many chromosomes.

• The new cells would have too many or too few nuclei.

• The new cells would have an incorrect number of chromosomes.

Allia uses a microscope to look at slides of onion cells. The slides show the stages of the cell cycle. The slides are labeled and in the correct order, starting with interphase. In which slide would Allia first see chromosomes?

• anaphase

• prophase

• telophase

• cytokinesis

The figure above shows the basic concepts of cell division. Which of these statements describes what happens during stage 1? (hint: look at what happens before and after the #1 in the picture)

• DNA is copied.

• Chromosomes unwind.

• The nucleus duplicates.

• The chromosomes separate.

Cells spend 90% of their time in this stage of the cell cycle. This is the reason you would see most cells in this stage if viewed under a microscope.

• Prophase
• Metaphase
• Anaphase
• Interphase

Cell division occurs to allow for 

• Growth
• Reproduction
• Repair
• All of the above

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NGSS.HS-LS1-4

The cytoplasm is divided between the cells splitting the cell into two. Name that Stage!

• Cytokinesis
• Interphase
• Prophase
• Metaphase

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NGSS.HS-LS1-4

The chromosomes start to line up in the middle of the cell.

• Prophase
• Metaphase
• Anaphase
• Telophase

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NGSS.HS-LS1-4

What do the cells look like at the end of mitosis?

• different from original cell
• similar to the original cell
• identical to the original cell
• none of these

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NGSS.HS-LS1-4