10-2 Cell Division Worksheet

What is cytokinesis?

Cytokinesis is the division of the cytoplasm itself

When chromosomes become visible at the beginning of cell division, what does each chromosome consist of?

Each chromosome consists of two identical sister chromatids

Interphase is divided into what three phases?

G1 phase, S phase, G2 phase

What happens during the G2 phase?

Many of the organelles and molecules required for cell division are produced

What are the four phases of mitosis?

Prophase, Anaphase, Metaphase, and Telophase

What is the cell cycle?

The cell cycle is the series of events that cells go through as they grow and divide

How does cytokinesis occur in most animal cells?

The cell membrane is drawn inward until the cytoplasm is pinched into two nearly equal parts

What is the spindle?

The spindle is a fanlike microtubule structure that helps separate the chromosomes

Is the following sentence true or false? Chromosomes are not visible in most cells except during cell division.

True

Each pair of chromatids is attached at an area called the

centromere

The period of growth in between cell divisions is called

interphase

The division of the cell nucleus during the M phase of the cell cycle is called

mitosis

Event 15. The chromosomes move until they form two groups near the poles of the spindle. 16. The chromosomes become visible. 17. A nuclear envelope re-forms around each cluster of chromosomes. 18. The centrioles take up positions on opposite sides of the nucleus. 19. The chromosomes line up across the center of the cell. 20. The nucleolus becomes visible in each daughter nucleus. Phase a. Prophase b. Metaphase c. Anaphase d. Telophase

15. C 16. A 17. D 18. A 19. B 20. D

Circle the letter of the name for the two tiny structures located in the cytoplasm near the nuclear envelope at the beginning of prophase. A. centrioles B. spindles C. centromeres D. chromatids

A. centrioles

Circle the letter of what forms midway between the divided nucleus during cytokinesis in plant cells. A. cell nucleus B. cytoplasm C. cell plate D. cytoplasmic organelles

C. cell plate

What happens during the G1 phase?

Cells do most of their growing, increasing in size and synthesizing new proteins and organelles

What happens during the S phase?

Chromosomes are replicated and the synthesis of DNA molecules takes place. Also, key proteins associated with the chromosomes are synthesized