General Biology Date _____________ Name __________________________

HW: The “C” Words in Cell Division

Directions: Use your notes and text to complete the following questions.

Matching: Use the diagram to help identify the following terms. Match the terms to the statement that best describes it.

CHOICES:a. chromatin b. centrioles c. chromatids d. centromeres e. chromosomes

_____1)Compact, X-shaped structures made of DNA. These are easily seen as the cell divides.

_____2) The form of DNA found in a non-dividing cell. Genes can be transcribed when the DNA is in this form.

_____3) Small, cylindrical structures made of microtubules. Found only in animal cells.

_____4) One arm of a double chromosome made up of two identical strands of DNA.

_____5) The area of DNA that joins two identical chromatids.

_____6) You have 46 of these in each of your body cells (two possible answers).

_____7) The structure labeled “a” in the figure.

_____8) Each structure labeled “b” in the figure.

_____9) The entire, double-arm structure on the right

General Biology Date ________ Name ____________________________

HW: Stages of MitosisBelow is a list of some of the activities that occur during the cell cycle. Next to each activity, write the first letter of the phase of the cell cycle each statement describes.

I- interphase A-anaphaseP-prophase T-telophaseM-metaphase C-cytokinesis

______1) Intense period of cell growth and DNA replication.

______2) Double-arm chromosomes line up on the “equator” or middle of the cell.

______3) Chromatin becomes shorter and thicker as it condenses into double-arm chromosomes.

______4) In plant cells, the cell plate BEGINS to form. In animal cells a furrow begins to form.

______5) Spindle fibers contract, causing chromatids to separate and move to opposite ends of the cell.

______6) The nuclear membrane breaks down and disappears.

______7) Centrioles in animal cells move to opposite ends of the cell and spindle fibers begin to form.

______8) Chromosomes move to opposite ends or “poles” of the cell.

______9) Chromatids separate and are now called single-arm chromosomes.

______10) Spindle fibers disappear.

______11) Most cellular life processes (metabolic processes) occur during this stage.

______12) Division of cytoplasm and completion of furrow or cell plate takes place.

______13) DNA forms into chromatin and becomes thin and threadlike again.

______14) A chromatid from each pair of sister chromosomes is being pulled to each pole of the cell.

______15) Nuclear membrane reforms.

______16) Two, genetically identical “daughter” cells have just formed.

______17) Spindle fibers attach to the chromatids at the centromere.

18) Use numbers to place the following series of events in the correct order. The first step has been identified for you.

______ Furrow or cell plate begins to form

______ DNA condenses

______ Chromosomes lined up at the middle of the cell

______ Centromeres split and chromosomes separate

__1___ Active stage of cell growth , DNA is replicated

______ Chromosomes move to opposite poles of the cell

______ Spindle fibers form

______ Cytoplasm divides and two cells are formed

General Biology HW: Stages of Mitosis AGAINNNNNN Name ____________________

Label each statement below with the stage of mitosis or the cell cycle below that it describes.

___________________ 1) In what stage do double arm chromosomes split into single arm chromosomes?

___________________ 2) In which phase of interphase is the DNA replicated?

___________________ 3) In what stage do double arm chromosomes line up on the cell equator?

___________________ 4) In what stage does chromatin condense into chromosomes?

___________________ 5) When do chromosomes de-condense during mitosis?

___________________ 6) In what specific phase of interphase do centrioles in animal cells double?

___________________ 7) Which stage shows a complete cell plate and two new daughter cells?

Circle the correct answer in parenthesis to complete each of the following statements:

The cell cycle is composed of two types of division. The first is division of the

(mitochondria / nucleus) and the second is division of (cytoplasm / nucleus). The first division is called

(mitosis /cytokinesis)while the second division is called (mitosis/ cytokinesis).

During Interphase, the cell (divides/ grows) and the DNA is (replicated/ condensed). The three

stages during (interphase / cell division) include G1, S and G2. During both G1 and G2 the cell

(grows / shrinks). During the S phase, the DNA is (replicated / making proteins).

Mitosis begins with the (condensation / replication) of double arm chromosomes. The

(furrow /spindle fibers) begin to grow and the nuclear envelope (breaks down /builds up). This phase

is called ( interphase / prophase). When double arm chromosomes line up on the (equator /poles) of

the cell, (metaphase /prophase) has begun. When the sister (chromatids / chromatin) split,

(telophase / anaphase) is taking place.

The final stage of mitosis, (cytokinesis / telophase) occurs when single arm chromosomes are

at the (equator /poles) of the cell and the nuclear membrane is reforming. This is followed by

cytokinesis in which the (furrow / cell plate) in an animal cell is completed. Two (similar / identical)

cells are formed!

Biology Name____________________ Date_______________

Identify the Stages of MitosisDirections:

1. Number the following six diagrams of the stages of mitosis in animal cells in the proper order.2. Label each stage with the proper name.

Directions: 1. Number the following six diagrams of the stages of mitosis in plant cells in the proper order.2. Label each stage with the proper name.