1. KEY CONCEPT Cells divide during mitosis and cytokinesis.

2. I can describe the structure of a chromosome.
I can follow chromosomes through the processes of mitosis and cytokinesis.

3. Chromosomes condense at the start of mitosis.
DNA wraps around proteins (histones) that condense it.
DNA double helix
DNA and histones
Chromatin
Supercoiled DNA

4. DNA plus proteins is called chromatin.
chromatid
telomere
centromere
One half of a duplicated chromosome is a chromatid.
Sister chromatids are held together at the centromere.
Telomeres protect DNA and do not include genes.
Condensed, duplicated chromosome

5. Interphase prepares the cell to divide.
Mitosis and cytokinesis produce two genetically identical daughter cells.
Parent cell
centrioles
spindle fibers
centrosome
nucleus with
DNA
Interphase prepares the cell to divide.
During interphase, the DNA is duplicated.

6. Mitosis divides the cell’s nucleus in four phases.
During prophase, chromosomes condense and spindle fibers form.

7. Mitosis divides the cell’s nucleus in four phases.
During metaphase, chromosomes line up in the middle of the cell.

8. Mitosis divides the cell’s nucleus in four phases.
During anaphase, sister chromatids separate to opposite sides of the cell.

9. Mitosis divides the cell’s nucleus in four phases.
During telophase, the new nuclei form and chromosomes begin to uncoil.

10. Cytokinesis differs in animal and plant cells.
In animal cells, the membrane pinches closed.
In plant cells, a cell plate forms.

11. The processes of mitosis and cytokinesis produce two identical
a. daughter cells.
b. strands
c. chromosomes.
d. chromatids.

12. The process of organizing and condensing DNA into its compact form takes place at the start of
a. interphase.
b. metaphase.
c. mitosis.
d. cytokinesis

13. Which is the term for the group of proteins that organizes and condenses long strands of DNA into tight coils?
a. telomeres
b. centromeres
c. chromatids
d. histones

14. During which phase of mitosis do sister chromatids separate from each other?
a. prophase
b. metaphase
c. anaphase
d. telophase

15. Which of the following statements is true of cytokinesis?
a. takes place in plant cells only
b. completes the cell cycle
c. organizes DNA
d. occurs during prophase