DNA – Mitosis
Name:_______________________________________________
Mitosis: Making an Identical Cell
Mitosis – What is it?
A
Parts of the cell involved in mitosis
chromosomes
B
spindle fibres (microtubules)
C
centrioles
D
nuclear membrane
Using Your Science Notes draw the cell at each
phase of mitosis. Label the four parts of the cell
using the letter given. Describe what is going on
in your own words.
Diagram of cell (draw)
What is happening? (notes)
ANAPHASE
METAPHASE
PROPHASE
IINTERPHASE
Phase
1
TELOPHASE
Word Bank: Label the parts of the DNA molecule below
Codon, Cytosine, Thymine, Adenine, Guanine, Nitrogen bases, Sugar, &
Phosphate
Label the different Phase of Mitosis
2
Vocabulary Choose the vocabulary word to make each statement correct.
A. DNA deoxyribonucleic acid; the unique genetic code for
every living thing
B. INTERPHASE a stage of mitosis during which exact
copies of chromosomes are made
C. CENTROMERE a single point where two chromatids are
held together
D. CHROMOSOMES strands of genetic codes made up of
DNA molecules
E. SOMATIC any cell that is not a reproductive cell
F. HAPLOID a type of cell that contains a total of 23 chromosomes, half of what a
diploid cell has
G. CHROMATIDS two identical chromosomes that split and contain the same
genetic material
H. MITOSIS division of somatic cells to create new cells
I. DIPLOID a type of cell that contains 23 pairs or a total of 46 chromosomes
J. EUKARYOTIC has a clear, distinct nucleus
1. When an organism grows or repairs damaged tissue, new cells are created
through a process called________.
2. Your body has two types of cells: reproductive cells and ________.cells that
make up all the other body cells.
3. These cells have a distinct control center, or nucleus, which means they are
________.
4. Each nucleus contains the genetic code or ________.for that organism.
5. Each human has 46 special genetic codes or ________.that determine what
characteristics we get from our parents.
6. A cell’s cycle begins with ________. a stage where the genetic information in
chromosomes is copied.
7. Almost all of the cells in humans are ________.which means having 46
chromosomes.
8. ________.cells have only 23 chromosomes because they will combine with
another set of 23 chromosomes during reproduction.
9. When each chromosome splits, the duplicates are called ________.
10. During interphase, the region of the chromosome where two are held
together is called the__________.
3
Vocabulary Choose the vocabulary word to make each statement correct.
A.
CENTRIOLES two small parts in animal cells that
direct the movement of chromosomes during
mitosis
B.
POLES opposite ends of a cell
C.
CYTOKINESIS when a cell’s cytoplasm divides
and cuts the cell in half
D.
ANAPHASE third stage of mitosis; chromatids
separate into chromosomes and spindle fibers
pull them to opposite poles
E.
DUPLICATE to make an exact copy of
F.
NUCLEAR MEMBRANE envelope around nucleus of a cell
G.
PROPHASE first stage of mitosis; chromosomes become visible and centrioles
move towards poles
H.
ALIGN to line up
I.
METAPHASE second stage of mitosis; nuclear membrane dissolves and
chromatids align in center
J.
TELOPHASE fourth stage of mitosis; chromosomes at opposite poles, spindle
fibers break down, and a nuclear envelope forms around both sets of
chromosomes
1. The phase of mitosis where the nuclear membrane dissolves is the_______.
2. The envelope that surrounds the cell’s nucleus is the______.
3. Another word to describe opposite ends of a cell is______.
4. It is the function of the ______to assist the movement of chromosomes during
mitosis.
5. During ______, the centrioles move towards opposite ends of the cell.
6. During ______, a cell is cut in half when the cytoplasm divides.
7. Before mitosis, each pair of chromosomes makes an exact copy or a______.
8. It is during ______ that new nuclear envelopes form around both sets of
chromosomes.
9. During metaphase, the chromatids ______ at the center of the spindle.
10. Chromosomes move to opposite poles during ______.
4
Mitosis Quiz
______1. Mitosis:
a. Takes place only in brain tissue
b. Is how cells reproduce and tissues grow
c. Divides only the cell nucleus
d. Creates cells that are different from each other
______2. Human haploid (Body) cells have:
a. 23 pairs of chromosomes
b. 46 chromosomes
c. 23 chromosomes
d. A and B
______3. Humans have ---?--- chromosomes in their somatic cells.
a. 47 b. 46 c. 23 d. 48
______4. A eukaryotic cell has:
a. No nucleus
c. An indistinct nucleus
b. A distinct nucleus
d. Two nuclei
______5. Chromosomes are made of:
a. Sugar and spice
b. DNA molecules
c. DNA and cytoplasm
d. The liquid from the cell
______6. Chromatids are joined together at a point called the ---?---.
a. Center point b. Middle c. Nucleus d. Centromere
______7. During prophase, the centrioles:
a. Join together
b. Move to center of cell and form 2 separate poles
c. Move to opposite ends of cell and form 2 separate poles
d. None of the above
______8. The four stages of mitosis in their correct order are:
a. Prophase, metaphase, anaphase, telophase
b. Prophase, telophase, anaphase, metaphase
c. Anaphase, prophase, metaphase, telophase
d. Telophase, metaphase, anaphase, prophase
______9. The chromosomes are pulled apart by the spindle fibers during which
stage:
a. Anaphase b. Interphase c. Telophase d. Prophase
______10. During interphase:
a. The cell grows
b. Chromosomes start to duplicate
c. The cell prepares for mitosis
d. All of the above
______11. During metaphase:
a. The double chromosomes line up in the middle.
b. The spindle fibers attach to the centromere
c. The cell membrane closes around the new cells
d. The chromatids split at the centromere
5
______12. In which stage do the nuclear membrane reform around the separate
sets of chromosomes:
a. Anaphase
b. Interphase c. Telophase d. Prophase
______13. After mitotic cell division, or mitosis, the daughter cells contain:
a. Half of the chromosomes of the parent cell
b. The same number of chromosomes as the parent cell
c. A random number of chromosomes
d. An unknown number of chromosomes
______14. What structure inside the cell helps pull the chromatids apart?
a. Cytoplasm b. Spindle Fibers c. Nucleus d. Membrane
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METAPHASE
MITOSIS
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REPLICATION
SPINDLE-FIBERS
TELOPHASE
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