Mitosis Notes
Cell division occurs in a series of stages, or phases.
lst: INTERPHASE .
.
Chromosomes are copied (# doubles)
Chromosomes appear as threadlike coils (chromatin)
at the start, but each chromosome and its copy
(sister chromosome) change to sister chfomatids at
Sister chromatids
end of this phase
ffi?ndz PROPHASE
.
.
.
3rd:
METAPHASE
.
centromere
Mitosis begins (cell begins to divide)
Centrioles (or poles) appear and begin to move to
'L'
opposite ends of cell
Spindle fibers form between the poles
Chromatids (or pairs of chromosomes) attach to the
spindle fibers
Sister
chromatids
4th:
ANAPHASE
Chromatids (or pairs of chromosomes) separate and
begin to move to opposite ends of the cell
-,._-
-+
Sth:
TELOPHASE
re
.
.
.
chromatids
@=,
Two new nuclei form
Chromosomes appear as chromatin (threads rather
than rods)
Mitosis ends
6th: CYTOKINESIS . Cell membrane moves inward to create two daughter
cells - each with its own nucleus wit]l identical
@@
chromosomes
Mitosis Notes
Name
D,ris roJ
Ce,-occurs in a series of stases. or ft*ses
r"t, E [.d.sg- . Chromosomes ... Cop\oA (# doubles)
l---]-----
.
C4Y
Chromosomes appear as threadlike coils el^..o *o.\
at the start, but each chromosome and its copy
L€ t*Le( chromosome) change to sister chromatids at
Sister chromatids
end of this phase
t
Cen\.o
[" .,,
a
Pti
a
G"[.lote.s
nnece-
begins (cell begins to divide)
(or poles) appear and begin to move to
'"/v.
(or pairs of chromosomes) attach to the
spindle fibers
Sister
chrornatids
*L
and
the cell
' Two new nucle{
.
form
Chromosomes appear as chromatin
than .oJs
{ao
cy
(-l\...Js
t
ends
6th:
c,'^ile6@
.
Cell membrane moves inward to create two
cells.- each with its own
C>h,f cr...,.C,SoV^C.f
rather