Cell Cycle and Cellular Reproduction Study Notes for Science Students
Are you a science major looking to ace your biology courses? Look no further! My "Cell Cycle and Cellular Reproduction Study Notes" are written to help you understand and master the fundamental concepts of biology, essential for...
cell
cycle- ordered set of
stages that happen between the time a cell divides and the
time its alls divide
resulting daughter
when cell is
going to divide-o
grows bigger ,
number of
organelles and amount of DNA doubles
phases of the cell
two
cycle
:
↳
interphase (includes number of phases
cytokinesis)
↳ mitotic (includes mitosis and
stage
INTERPHASE
makes up most of cell
cycle
to is the time when cell performs usual function
↳ amount cells complete full
of for cell spend in interphase varies
. embryonic
time to
g
, e .
cycle in a few hours , for adult mammal cells interphase takes about 20 hours (90 % of cell cycle)
of 3 G . , S , G2
consists
stages
:
En
Stage
n - before
Gy checkpoint
G
stage replication
-
-
DNA -
will occur Otherwise , the cell
after DNA replication
stage G2
>
-
.
is committed to divide when ⑳
growth signals are present
Cyc
and nutrients are available
. -
· ccur if the DNA is
in G cell recovers from previous division ,
damaged and
F and
repaired
doubles
organelles
cannot be
in size
grows
.
,
M
accumulates materials used for DNA
checkpointbly
(also just
checkpoint. Mitosis
will not continue if
Synthesis carries out normal
daily
chromosomesarSeed
e
cell)
.
functions of
some cells (e cells) complete cell arrested,
nerve and muscle do not
cycle are
permanently
-
g
.
.
exit interphase and enter phase called Go
↳ in
Go perform normal function but do not prepare for all division cannot leave Go
they
-
without proper
signals from other cells (tightly controls completion of cell cycle
S
stage
starts when DNA replication occurs
each chromosome made up of one DNA double helix -
after replication each is made up of two
identical double helix molecule
-o each double helix =
chromatid , two identical chromatids =
Sister chromatids
↳ sister attached until separated
chromatids
stay during mitosis
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