Cell Division
(Mitosis)

In our cells the genetic information that is carried from one
generation to the next is carried by ____________________
o Chromosomes are made up of _______
o Every organism has a specific number of chromosomes
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Fruit Fly =8
Human = 46
Carrot = 18

Chromosomes are ________________________ in most cells except
during cell division

Before cell division, each chromosome is ______________, or copied

Because of this, at the beginning of cell division each chromosome
consists of two identical ____________________
o Each pair of chromatids are attached at an area
called a __________________

During the cell cycle, a cell grows, prepares for division,
and divides to form two daughter cells, each of which
then begins the cycle again

The cell cycle consists of two distinct phases
o
o

Interphase is broken down into three different steps
(This is not necessarily part of mitosis)
o

o

o
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
When the events of G2 are complete
the cell is ready to enter
the___________________________

Mitosis can be divided into
___________ different phases:
o Depending on the type of
cell:
o the four phases of mitosis can
last a few minutes or several
days

Prophase:
o The longest phase of mitosis
o The ___________________ become visible
o _______________________, which are two tiny
structures located in the cytoplasm near the nuclear
envelope, separate and move to opposite sides of the
nucleus
o The ________________________ form
o
o ______________________become attached to the
spindle fibers at the centromere of each chromatid
o _________________(ribosomes are made here)
disappears as does the nuclear envelope

Metaphase:
o Second phase of mitosis
o Lasts only a few minutes
o The chromosomes ____________ across the
center of the cell

Anaphase:
o Third phase of mitosis
o The ___________________ that join the sister
chromatids _______________
o Allows the_______________ to separate and
become individual chromosomes
o These chromosomes continue to move until they
have separated into __________________ on
opposite sides of the cell

Telophase:
o Fourth phase of mitosis
o Everything that happened during
_______________ is reversed
o The __________________ disappear
o Two new _____________________ are formed
o Chromosomes are ____________________
o Chromosomes turns back into ______________

Cytokinesis:
o At the end of mitosis, two _____________--each with
a duplicate set of chromosomes--are formed
o All that remains to complete the cell cycle is
__________________, the division of the cytoplasm
o Cytokinesis usually occurs at the same time as
_______________
o Cytokinesis can take place in a number of ways
o In animal cells:

Each part contains its own nucleus and
organelles
o In plants a cell:
o The _________________ gradually develops into a separating membrane
o A ___________________ then begins to appear in the cell plate
Mitosis in Onion Root Tips