Mitosis Review
• 1. What is the purpose of mitosis?
• To make new daughter cells when a cell
becomes to old, too large or damaged.
• How many daughter cells are made during
mitosis?
• 2
• What is the purpose of meiosis?
• To make gametes for the purpose of sexual
reproduction.
• How many daughter cells are made during
meiosis?
• 4
• What are the three parts of the cell cycle?
• 1. Interphase
• 2. Mitosis
• 3. Cytokinesis
• What happens during Interphase?
•
•
•
•
G1, S, G2
G1: primary growth phase
S: Synthesis; DNA replicated
G2: Secondary growth phase
• What are the phases of mitosis?
•
•
•
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Prophase
Metaphase
Anaphase
Telophase
Which phase is it?
Four Mitotic Stages
Prophase
Metaphase
Anaphase
Telophase
17
• Spindle fibers(microtubules) called
________________
attach to the centromere of each chromosome.
• kinetochores
• The nuclear envelope and nucleolus are
broken down in _________________ phase of
mitosis. It then reappears during
_______________.
• Prophase, telophase
• The longest phase of the cell cycle
is_____________________.
• Interphase
• The longest phase of mitosis is
_____________________
• prophase
• During ________________ which occurs
rapidly, the sister chromatids are pulled apart
to opposite poles of the cell by kinetochores.
• anaphase
• During ______________ chromosomes are
lined up at the equator.
• metaphase
• How many chromosomes are there in a
human autosome?
• 46
• How many chromosomes are there in a
human gamete?
• 23
• Having a full set of chromosomes in a cell is
also known as________________.
• diploid
• Have half a set of chromosomes in a cell is
known as______________.
• Haploid.
• What is the purpose of a karyotype?
• To view the paired chromosomes from largest
to smallest. It can show if there is an extra set
of chromosomes. (Down’s syndrome)
• Why would destroying a cell’s ability to use
their spindle fibers (microtubules) affect the
cell growth?
• A cell can not growth into two new daughter
cells without the help of the spindle fibers.
• An uncontrolled rate of cell growth is known
as_______________
• cancer
• How is cytokinesis different in a human cell to
that of a plant cell?
• A human cell will form a furrow.
• A plant cell will form a plate wall between the
two new cells.
• During ____________ sister chromatids are at
opposite poles.
• telophase
• During a karyotype the sex chromosomes
indicated: XX. Is this a boy or a girl?
• girl
• Duplicated chromosomes are called
_______________ and are help together by
their ________________.
• Chromatids, centromere
• Why can’t a person see the chromosomes
during interphase?
• They are long, thin and stringy (known as
chromatin). They have just duplicated.